Every once in a while, a blip on the radar comes up, letting us know that there’s something not quite right in our little corner of the Mac Universe. This time around, it came in the form of Tweets directed to us, as well as in posting in popular Mac forums.
As it turns out, several other memory vendors—along with some Late 08 MacBook/MacBook Pro users—have laid claim to these machines working with 8GB of RAM. This was contradictory to our testing in December 2009 which quite clearly showed that while these models recognized a full 8GB, if an application addressed more than 6GB, the system would slow down significantly.
Not being the type to just let these sorts of claims to go unchallenged, we went back to our testing lab, grabbed the affected model machines, running 10.6.6. and dropped an 8GB upgrade kit in them.
The results were exactly the same as in 2009, lending credence to our conclusions, but the sheer number of claims to the contrary led us to continue searching—and the trail ended at Apple.
In late 2009, an EFI Firmware Update was released to address the buzzing noises coming from the optical drive. However, it seems that somewhere along the line, Apple changed this update without notating it anywhere.
Whether any other elements were affected by this change is undetermined, but it did change memory addressing; with the later version of the update installed, you could address a full 8GB in Snow Leopard. Unfortunately, Software Update doesn’t show this version as being different from the previous one, so users wouldn’t be notified if they had already updated their firmware to the older version.
The practical upshot of all this is that if you installed the EFI Update when it first came out, like we did, you would have gotten the old code, which meant your computer would only address 6GB properly. Those who didn’t upgrade until after Apple changed the updater got the newer firmware, which allowed proper addressing of 8GB.
Once we manually installed the “updated” version of the EFI Firmware in our test machines, they were able to address 8GB normally, without any crashing or slowdowns.
How do you ensure your Late ‘08 MacBook/MacBook Pro can address 8GB of RAM?
First, you want to make sure you have one of the affected models:
- MacBook 13.3″ 2.0GHz and 2.4GHz
- MacBook Pro 15″ 2.4GHz model w/ExpressCard Slot
- MacBook Pro 15″ 2.53GHz model w/ExpressCard Slot
- MacBook Pro 15″ 2.66GHz model w/ExpressCard Slot
- MacBook Pro 15″ 2.8GHz model w/ExpressCard Slot
- MacBook Pro 15″ 2.93GHz model w/ExpressCard Slot
Next, check the Boot ROM Version in your System Profiler.
- MacBook Pros with a Model ID of MacBookPro5,1 should have a Boot ROM Version of MBP51.007E.B05.
- MacBooks with a Model ID of MacBook5,1 should have a Boot ROM version of MB51.007D.B03
- Machines with other Model IDs are not affected and don’t need an update.
- **IMPORTANT NOTE: EFI Firmware Update 2.8 was released on February 28, 2012 for the Later 2008 MacBook Pro. If you have installed that update, your Boot ROM version will be MBP51.007E.B06. If you have this update installed, you’re already able to install the 8GB without any problems and don’t need to perform further updates to install more RAM.
If your Boot ROM version does not match the numbers above, download the appropriate firmware updater for your model machine and install according to the instructions:
- For MacBook Pros (MacBookPro5,1)
MacBook Pro EFI Firmware Update 1.8 - For MacBooks (MacBook5,1)
MacBook EFI Firmware Update 1.4
Once you have ensured that the Boot ROM is the correct version, make sure your Operating System is updated to OSX 10.6.6. You must be running Snow Leopard or later to address 8GB on these systems, and our testing was done with 10.6.6, which is the earliest version we’re currently supporting for this.
Pardon us for our initial skepticism on this larger memory capacity finding. We had some pretty good reasons for it. First, this is the first time in our recollection that an EFI update and a dot version OS update both combined to affect memory addressing. Secondly, this reminded us of when after we were the first to qualify 2007-2009 Core 2 Duo MacBook Pro and MacBook models supporting 6GB max without experiencing a dramatic system slowdown, certain memory resellers pushed the same idea about 8GB compatibility.
Or in other shorter words, if we can’t prove either benchmark performance gains and/or system stability, we’re just not going to market a memory upgrade just to pad our MaxRAM credentials.
Your trust in us is more important than any other objective here.
UPDATE – FURTHER CLARIFICATION
Judging by the sheer number of comments, there seems to be some confusion as to which MacBooks and MacBook Pros this update applies to. We’ve created a simple flowchart that should help clear up some of the confusion.
UPDATE: FEBRUARY 2012
EFI Firmware Update 2.8 was released on February 28, 2012 for the MacBook Pro, to resolve graphics issues. It does not disable the 8GB compatibility the previous firmware revision granted.
Hi, I have the Unibody MacBook 13″ aluminum (MacBook5,1) and have downloaded the EFI 1.4 update already. However I don’t recall exactly *when* I downloaded the update, whether it was before or after Apple snuck in the “secret” 8 GB update. My BootROM version is MB51.007D.B03. Did the “old” (non 8 GB) version of the update use the same version number, or is MB51.007D.B03 definitely the version that supports 8 GB? Thanks!
“MacBooks with a Model ID of MacBook5,1 should have a Boot ROM version of MB51.007D.B03″
Sounds like you’re all set. :-)
OK, so they did change the BootRom version number when they released the 8 GB update version. Good to know! Time to go order meself some RAM!
I want to upgrade my 5,1 Mac book, 2GHz, 2gb all specs correct (except still on 10.8.5 so will upgrade to Snow Leopard)
but can I use PC3-10600 DDR3 1333MHz SO-DIMM
instead of PC3-8500 DDR3 1066MHz SO-DIMM??? Could that make it faster??? Sorry am a layman when it comes to tech stuff
This is a commonly asked question. Every so often we will find certain model computers can benefit from faster memory, like the 2011 MacBook Pro. For a MacBook5,1 we have found no benefits of 1333Mhz memory being installed into this model, so we only recommend the 1066Mhz memory.
My Macbook is Macbook 5,1 with Boot ROM Version MB51.007D.B03 looking to upgrade my memory to the max. I am also running Mac OS X Lion 10.7.5. After following your directions, I was unable to install the EFI Firmware Update 1.4. Is it because I am running Lion?
If your Boot ROM version is already MB51.007D.B03, then you’ve already updated your firmware.
Thanks for your response. So I can get my Macbook up to 8gb right?
That is correct.
I bought identical memory from a reputable brand (because I can get it off the shelf and the need was urgent) and it doesn’t work – just giving me 3 long (and sometimes 3 short in-between) beeps.
I’ve tried all combos, all slot options and no difference is forthcoming
You guys sound pretty confident that OWC will work, and you’ll guarantee it? I’m in the netherlands, so the shipping is the real challenge.
Just in case, here are the Mac’s details:
Model Name: MacBook Pro
Model Identifier: MacBookPro5,1
Processor Name: Intel Core 2 Duo
Processor Speed: 2.66 GHz
Number of Processors: 1
Total Number of Cores: 2
L2 Cache: 6 MB
Memory: 4 GB
Bus Speed: 1.07 GHz
Boot ROM Version: MBP51.007E.B06
SMC Version (system): 1.41f2
Serial Number (system):
Hardware UUID:
Sudden Motion Sensor:
State: Enabled
if confirmed, I’ll order soonest – thanks
Model Identifier: MacBookPro5,1 < -- correct model
Boot ROM Version: MBP51.007E.B06 <-- correct Boot ROM version
That's all you need to confirm that the RAM will work.
Here is a link to the correct modules:
http://eshop.macsales.com/item/Other%20World%20Computing/8566DDR3S8GP/
We do not support other brands nor different speeds/configurations outside those that we have qualified through our MaxRAM Memory Certification Program. All OWC Brand memory is designed to meet or exceed manufacturer specifications and is backed by industry-leading lifetime advanced replacement warranty.
Hello,
The following are my specifications, I believe I am good to purchase the memory you reference in this article, correct?
Model Name: MacBook Pro
Model Identifier: MacBookPro5,1
Processor Name: Intel Core 2 Duo
Processor Speed: 2.4 GHz
Number of Processors: 1
Total Number of Cores: 2
L2 Cache: 3 MB
Memory: 2 GB
Bus Speed: 1.07 GHz
Boot ROM Version: MBP51.007E.B06
SMC Version (system): 1.33f8
Hardware UUID: A00AFBE8-79FE-5748-9701-AA63E0A67EA4
Sudden Motion Sensor:
State: Enabled
Thanks!
Yes. You are.
I know is the wrong article, but i cant find a solution, Michael do you know if there’s a way to modify The Efi o somenting on my macbook pro
Model Name: MacBook Pro
Model Identifier: MacBookPro6,1
Processor Name: Intel Core i7
Processor Speed: 2.8 GHz
Number of Processors: 1
Total Number of Cores: 2
L2 Cache (per Core): 256 KB
L3 Cache: 4 MB
Memory: 8 GB
Processor Interconnect Speed: 4.8 GT/s
Boot ROM Version: MBP61.0057.B0F
SMC Version (system): 1.57f18
So i can get 16gb ram?
Your 17″ MacBook Pro – Mid 2010 is OWC certified for up to a maximum of 8GB of memory.
Worked like a charm. Thanks!
I meet all of the requirements.
13 inch 2.4 Ghz MacBook (Late 2008) running 10.8.2
MacBook5,1
MB51.007D.B03
The most I can get the system to run is 6GB, is this it for my machine or am I missing something?
When I install both 4GB modules I get a kernel type error on load up screen. DOS like text/ code.
I can’t imagine how as I have read this and other articles up and down multiple times before I even ordered my Apple 1066 RAM so as to NOT have this problem!!!
I ran each 4GB module separately to make sure one isn’t bad. They are both good.
I even reset PRAM.
Could it possibly be the Apple RAM?
Please help
Thanks in advance!
It is certainly possible.
This is something that should be made abundantly clear…you are reading the OWC Blog, which is the Official Blog of Other World Computing. We have been providing quality hardware products and support to the computer industry since 1988 and feature one of the largest online catalogs of computer, iPod, iPhone, and iPad enhancement products through our e-commerce portal http://www.macsales.com.
When it comes to memory (RAM) all of our testing and qualifications are expressly performed with OWC Brand memory.
All OWC Brand memory:
Additionally, we qualify our memory through an additional, independent compatibility tests. The OWC ‘MaxRAM’ Certification Program determines the maximum amount of memory that can be installed in a Mac as validated by a series of comprehensive, in-house laboratory tests. While OWC “MaxRAM” configurations exceed Apple’s officially supported maximums, all OWC brand memory upgrades are assured to perform flawlessly and are covered by a Lifetime Advance Replacement Warranty and Money Back Guarantee.
Hello, I have a late 2008 MacBook Pro running Mountain Lion 10.8.2 with the following specs:
Model Identifier: MacBookPro4,1
Processor Name: Intel Core 2 Duo
Processor Speed: 2.5 GHz
Number of Processors: 1
Total Number of Cores: 2
L2 Cache: 6 MB
Memory: 4 GB
Bus Speed: 800 MHz
Boot ROM Version: MBP41.00C1.B03
SMC Version (system): 1.28f3
Serial Number (system): YD91351B3R8
Hardware UUID: 52491FB1-FAB1-5C53-A8A1-907E19A33FED
Sudden Motion Sensor:
State: Enabled
I have a Western Digital 1TB HDD installed and am needing to run Windows due to some software I need for business that only runs in Windows. Can this MBP be upgraded to 8Gb?
Many thanks for any help you can offer!
No, this article refers to the MacBookPro5,1 , not the MacBookPro4,1 .
The Apple MacBook Pro 15″ & 17″ – Early 2008 (Model Identifier: MacBookPro4,1 ) models are OWC certified for up to 6GB of memory.
Hello Michael. I upgraded my 5,1 to 8GB RAM (running on Mountain Lion and I have all the firmware requirements) with AVANT 4GB DDR3 SODIMM 1066MHZ ROHS around 2 weeks ago. The computer was so much faster….BUT then apps started crashing. My browsers crash 5-6 times a day, my apps crash, my computer shuts down out of the blue…this never happened with the slower RAM. So I removed it and put the old RAM back in. Do you have any suggestions, other than buying your own brand? Does this sound like bad RAM? Thanks! Emily
Hi,
I know this is an “old” post but it doesn’t work for me. I bought the CORSAIR SO-DIMM DDR3 For MAC – PC3-8500 – 2 x 4 Go (8Go) 1066 MHz – CAS 7 – CMSA8GX3M2A1066C7 kit. When I boot the MBP, it beeps three times.
I don’t understand why though: I’ve checked 10 times the RAM specs.
Thanks !
We only sell and support OWC Brand Memory.
Beeps at startup usually suggests mis-seated, incompatible, or defective memory.
This is the correct memory here:
http://eshop.macsales.com/item/Other%20World%20Computing/8566DDR3S8GP/
Hey,
yeah, I’ll ship back the ram I bought and get the one you showed me.
Thanks a lot
When guys dropped in the 8GB kit did guys just pick a manufacturer randomly or do you prefer one. I’d like to upgrade but unsure which kit to get. Can you help direct me?
Pick memory randomly? – Absolutely not!
Other World Computing sells and supports OWC Brand memory only.
Here is the link to the memory kit referred to in the article:
http://eshop.macsales.com/item/Other%20World%20Computing/8566DDR3S8GP/
Hello, I have a late 2008 MacBook Pro running Mountain Lion 10.8.2 with the following specs:
Model Identifier: MacBookPro5,1
Processor Name: Intel Core 2 Duo
Processor Speed: 2.4 GHz
Number of Processors: 1
Total Number of Cores: 2
L2 Cache: 3 MB
Memory: 4 GB
Bus Speed: 1.07 GHz
Boot ROM Version: MBP51.007E.B06
SMC Version (system): 1.41f2
Serial Number (system): W89203818Q1
Hardware UUID: 57AE2375-63DD-5E1D-BF3F-1C93D6CA7AFB
Sudden Motion Sensor:
State: Enabled
May I safely upgrade to 8 GB’s of RAM? It seems from the article that I should be ok doing so?
And if all looks good, is this what I want?: http://eshop.macsales.com/item/Other%20World%20Computing/8566DDR3S8GP/
Thanks in advance for any guidance!
Yes, you’re good to go with the memory you’ve chosen. Upgrade away.
Thank you so much for your quick response! You don’t anticipate I’d have any problems whatsoever? I’m nervous as Apple officially only recommends 4 GB’s. By doubling to 8 GB’s I’m not going to risk hurting my machine at all? Sorry if I’m asking you to repeat yourself, I’d just like a little more peace of mind before I move forward.
I’m looking into more RAM is because my machine is starting to feel sluggish, and a little “sticky” (if that makes sense…), but I’m also thinking about doing an archive and clean re-install, and possibly replacing my internal hard drive. Money is a bit of a factor at the moment, so I’m looking at possibly doing all of this, over time, but I’m curious, in your expert opinion, about the order in which I should try these things. Should I try replacing the hard drive first? Or getting the RAM? Or the archive/re-install? Will doing an archive and re-install be worth the trouble and the time?
Just some background: I don’t do anything too hardcore with my MBP–but I do a lot of surfing on the web using Firefox, with LOTS of tabs open, sometimes I might have Safari or Chrome open, too, and I have Spotify running in the background, and possibly Tweetbot and another Twitter client—maybe the old Tweetdeck, Mail, Transmit, uTorrent, NetNewswire, and Messages….but I have been trying to keep my open apps to a minimum, because everything has been seeming more and more sluggish. I would probably run more, if it didn’t slow down my machine much. I thought 4 GB’s of RAM would easily be able to handle what I’m doing. Do you think upgrading to 8GB of RAM would be a noticeable difference?
Any of your general thoughts on all of this would again be much appreciated! Thanks!
We’ve been successfully exceeding Apple’s officially supported maximums for quite some time through our OWC MaxRAM Memory Certification program. Plus, all OWC brand memory upgrades are assured to perform flawlessly and are covered by a Lifetime Advance Replacement Warranty and Money Back Guarantee.
Now, given what you do on a daily basis with your computer, RAM is definitely the first place to start. More memory allows you to run more processes at once and with all those pages on all your browsers, all those social clients, and the other programs you have running at the same time – you’re probably running short on memory quite often.
Got it, I will order the RAM soon, thanks! Do people notice a big difference when upgrading from 4GB’s to 8? Also, in general, do you recommend an archive and clean install every once in a while? I’ve had this computer since May ’09 and its gone through several OS X upgrades, so I’m thinking a nice new clean install of Mountain Lion might be good? Some claim it will speed things up, but it’s seems like a bit of an extreme measure to me, and I don’t like taking risks w/out feeling the benefit would be worth it… And I guess I really need the new hard drive eventually as I’m always running out of space. I try to always keep at least 10% of my drive or 20 GB’s free, as that’s what many suggest. I’m also looking into the possibility of using iTunes Match to save space in that department and I use a 64 GB thumb drive, so that’s helping a bit. Sorry for my babbling, I’m sharing a bit much with the hopes it might help others whose machines are slowing down and running out of space as well.
Yes, the difference between 4GB and 8GB of memory can be quite drastic as evidenced by our benchmarking results.
A clean install of your OS and a migration of your user account(s) can help with speeding up a machine that has been neglected for maintenance. It will clean up files that are no longer used, preference files for apps you’ve deleted, miscellaneous cache files, etc. and that can account for some sluggishness.
However, a good rule of thumb is that a hard drive should not be kept higher than 80% capacity. If you are consistently crossing that threshold, then you will want to move some of the data to an external drive or simply upgrade to a larger capacity internally. If you’ve hit that 10% left mark – then you’re in critical need of more storage. Think of it like a room full of bookshelves – as long as all the books still fit on the shelves themselves, then you can still walk into the room and find everything. Once you start piling books up on the floor, you’re making it more difficult and a bit slower (but not impossible) to find the tome you’re looking for. If all the aisles are now covered with books and you’re crawling over piles and moving books from one cramped space to another cramped space just to read the titles – things are definitely getting slower. You really need to open up the space somehow (before filling it all the way up) in order to become efficient again.
Upgrading to a larger drive (which sounds like an important next step for you) provides the perfect opportunity to install a fresh copy of the OS onto the new drive and use Migration Assistant to bring all your data over to the new drive.
I ordered the memory and so that’s on it’s way and I will see how much that improves my system and will certainly be reviewing and considering this other info you’ve linked to, as well. Thanks again for all your advice and help! Much appreciated!
Hello, first of all a compliment for your expertise , but im curious about one thing, i have a MBP 5,1 and have updated the firmware 2.8, but my BootRom does not change it stays as MBP51.007E.B05, have you any ideas of how to solve this dilema, im running 4gb memory, and as from today thanks to your research and site, i yearn for 8 gig…hope i can get this sorted out….thank you in advance for all your support anyhow……regards Peter.
MacBook Pros with a Model ID of MacBookPro5,1 should have a Boot ROM Version of MBP51.007E.B05. You don’t have a dilemma – you’ve got a machine you already updated to the right Boot ROM version.
Thanks for the quick reply, does that mean im good to go ? i can load 8 gb (2x4gb)…..if it is youve made me the happiest man the Netherlands, for now that is :-)
That certainly does mean you’re good to go. ;-)
Great, does this apply ti 2007 24″ Imac7,1 can i bump this also to 8 gig, ive got 4 now ?
The Apple iMac – Mid 2007 (Model ID: iMac7,1) has been OWC certified for up to 6GB of memory.
Thanks, guess ill be upgrading em all, thanks again.
Hi! I have a Macbook Pro 15 inch late 2008 Boot Rom MBP51.007E.B06. Can I install a 16GB stick? I know it’s really wierd to have that much memory but I am just curious. Thanks in advance.
Individual 16GB 1066MHz DDR3 (PC2-8500) SoDIMM RAM modules are not available to test.
I use a Virtial Machine and Movie Editing Programs. What RAM would you recommend? (How much GB and what should be the clock?)
For video editing, you’ll want as much as your setup can use which, as is the topic of this post, is 8GB of OWC memory.
I just upgraded to 10.8.2. The computer place I used to do this told me I could run 8GB in my 2.5 GHz early 2008 MBP 41.00C1.B03. I didnt believe it, but then he popped it in 1 at a time. The first time it did the 3 beeps, so he did something and reinserted it and then the other, and sure enough it showed 8GB 667 Mhz DDR2 SDRAM. I think I already know the answer, but with my system, will it pose problems like shutdowns and overheating? And even though it showed 8 GB, would it really get the whole 8 with my system? Thanks for your time and patience. I am slowly learning about all this stuff.
The MacBook Pro Early 2008 models are OWC certified for up to 6.0GB of OWC memory. Once the 6GB mark has been exceeded in actual memory usage (not just having it installed in the machine – but actually being addressed) the system slows down and/or loses stability. As such we do not support 8GB of memory in those machines.
can i upgrade to 8GB of RAM with a Model ID of MacBook5,2 running 10.8.8?
The MacBook5,2 model is OWC Certified for up to 6GB of OWC memory.
Hi guys, thank you for your profound work!
I have all the specs listed in your article and my MacBook late 2008 is running with 8GB memory.
But when I start a program that uses a lot of RAM (FilterForge) my Mac just shuts down. It goes black and I have to restart. Everything I’ve done is lost.
It did not do that with 4GB.
i am running Kingston KTA – MB1066K2/8G (9905428-005.A02LF)
well, for testing purposes I am running at the same time: Safari, FilterForge, Mail, Cinema4D R11, Poser Pro12, iPhoto, Photoshop CS6, Google Earth, iTunes, InDesign CS6, skype, Word 2011. (all legal – before someone asks)
It uses 4.97 GB memory out of 8 … and it seems to work. I have MacOS 10.6.8 … I switched the two 4GB with each other and I plugged my machine back to electricity (which I did not the last time).
So it works and my last question is obsolete. (please excuse my weired english – not my native language)
Our OWC ‘MaxRAM’ Certification Program determines the maximum amount of memory that can be installed in a Mac as validated by a series of comprehensive, in-house laboratory tests – which we perform and support only with OWC brand memory upgrades which are designed to meet or exceed all manufacturer specifications.
Hi i have the Macbook 5,1 and the right ROM version from the article, but after inserting one or both of my 4gb ddr3 1066cl7 rams my macbook makes the 3 beeps over and over. how can i force the efi firmware, i think i updated with the old one when it came out. every help is appreciated.
Three beeps indicates the system can’t find the memory at all. This can be caused by a couple of things:
1. Incompatible memory. This is the right memory here.
2. Improperly installed memory. Try one at a time making sure the memory is fully seated. If it isn’t pushed in all the way, it can’t be accessed.
3. Bad memory. If one of the modules has failed, it will need to be replaced. Luckily all of our OWC Brand memory comes with a Lifetime Advanced Replacement Warranty for just this reason. Checking the modules one at a time will also let you know if you have a bad one.
4. While rare, it could mean the memory slot itself has gone bad. Try installing the original memory again and if it doesn’t boot the machine either, you may need to go to Apple to have the memory bay repaired.
can i upgrade my late 2008 macbook with 8gb if i’m running version 10.8.2. on my laptop
As long as your late ’08 MacBook has a Model ID of MacBook5,1 and a Boot ROM version of MB51.007D.B03, then yes.
I’ve installed the 8 GB RAM (2 x 4GB) that I just received from OWC (fast, BTW!) but it is only recognizing 4 GB. I went back in and reinstalled the RAM panels carefully, snapping them securely in place, but it is still only recognizing 4 GB. Am I missing something? All the specs seem accurate to a ‘T’. Help! I’m running 10,6.8 and ere are the specs as they’re showing:
Model Name: MacBook
Model Identifier: MacBook5,1
Processor Name: Intel Core 2 Duo
Processor Speed: 2.4 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache: 3 MB
Memory: 4 GB
Bus Speed: 1.07 GHz
Boot ROM Version: MB51.007D.B03
SMC Version (system): 1.32f8
Serial Number (system): W8848K5N1AX
Hardware UUID: AC1E04B8-E570-5669-B902-32110EF118B4
Sudden Motion Sensor:
State: Enabled
While rare, it is possible that either the memory itself or the RAM slot is defective.
To determine which go to System Profiler > Hardware > Memory and make a note of which memory bank is showing the memory as active. Then physically swap the modules. If the issue follows the memory, then contact our Customer Service team to arrange for a replacement. If the problem follows the slot itself, then you will want to contact Apple for the repair.
Whether that was it, or just a case of 3rd time’s a charm, I switched the modules and voila… it’s recognizing and running at 8 GB. It’s like a new computer! Thank you very much for your help. I’m very pleased.
profiler says Boot ROM Version: MB51.007D.B03 but updater says this computer does not need this update. macbook 5,1 running 10.8.2 should my machine see the 8gb if I order it or is something other process needed?
As stated in the article: “MacBooks with a Model ID of MacBook5,1 should have a Boot ROM version of MB51.007D.B03″
You have the correct Boot ROM version for your machine – you can upgrade to 8GB of OWC Memory with confidence.
Hey, so I checked out my system and everything looks good! The only thing I need help with is finding the right ram chip to buy for it. If you guys could link me to some sources that would be awesome! Thanks!
http://eshop.macsales.com/item/Other%20World%20Computing/8566DDR3S8GP/
I have followed all these instructions, I am using a Mac Book Pro5,1 late 2008 on, MBP51.007E.B06 Mountain Lion OSX 10.8.2.
I have added the RAM but on the about this mac section it only says 4gb for the memory?
Check the connections of the memory – it sounds as if one of the modules isn’t seated fully.
Now the big question is: can it support 16GB of RAM now that 2x 8GB sticks are cheap?
No, 8.0GB PC8500 DDR3 1066MHz individual SoDIMMS aren’t available.
Aww. Darnit
Hey guys, great article! Was on the fence about upgrading my memory to 8gb but will do so now. I have model id MacBookPro 5,1; boot rom ver MBP51.007E.B06; OS ver 10.6.8. Everything checks out according to this article but was wondering, would I need to run the OS in 64 bit kernel once I upgrade my memory? I’ve read in some forums to do so and some say you don’t have to. Sorry if this was already addressed earlier in the article. Anyway, thanks in advance!
OWC memory is fully supported up to 8GB in those machines after the firmware update – regardless of running in 32 or 64 bit.
If I have a MBP 15″ 2.4Ghz Late 2008 5.1, with the newest firmware installed but am lacking an Express Card Slot, could I still update to 8GB Ram? My computer is extremely slow and I’d like to try smth before actually buying a new one. On an unrelated note, does the new 2012 MBA outperform the old 2008 MBP?
yes, the 5,1 MBP is 8GB capable. Our 8GB PC8500 Memory kit is fully recognized by this model with the current EFI.
http://eshop.macsales.com/item/OWC/8566DDR3S8GP/
The 2012 MacBook Air is faster than the 2008 MacBook Pro. The i5 and i7 Processors in the MBA are a several generations ahead. That being said, your existing 2008, with an SSD and the memory needed isn’t very far off for many normal uses.
Hi Guys
I have a MacBook Pro 15
Model Name: MacBook Pro
Model Identifier: MacBookPro3,1
Processor Name: Intel Core 2 Duo
Processor Speed: 2.6 GHz
Number of Processors: 1
Total Number of Cores: 2
L2 Cache: 4 MB
Memory: 4 GB
Bus Speed: 800 MHz
Boot ROM Version: MBP31.0070.B07
SMC Version (system): 1.16f11
Serial Number (system): W880815DXAG
Processor 2.6 GHz Intel Core 2 Duo
Memory 4 GB 667 MHz DDR2 SDRAM
Your computer’s firmware is up-to-date with version 1.5.1 of the MacBook Pro EFI Firmware Update.
My question is can, I upgrade memory from 4 to 8GB ?
Thanks for your help
The Apple MacBook Pro 15″ & 17″ – Mid 2007 models (Model ID: MacBookPro3,1) are OWC certified for up to 6GB of memory.
hey guys….
ive got a mac that has and hasnt been addressed….
ive got a late black macbook model4,1 that the article said was initially affected. then it goes on to say though that this model # doesnt need the efi update. BUT – nowhere else is anything mentioned about whether it can take 8gbs of ram…
so again, ive got a late 2008 BLACK MB MODEL4,1 that allegedly doesnt need the efi update…
can i install 8gb of ram or am i stuck at 6? (and therefore being uneven which i heard isnt that great…)
thanks so much guys…you guys really do rock! :)
The MacBook4,1 models are OWC Certified for up to 6.0GB of memory.
ya thats what i thought…just needed to make absolutely sure…
thanks guys…you guys really do rock!
Hi guys love the article can my mac support 8GB of ram if so Ive tried to download the firmware on your page but when I try to install it says that my mac doesn’t need it. Here is the spec of my Macbook Unibody Cheers.
Josef.
Model Name: MacBook
Model Identifier: MacBook5,1
Processor Name: Intel Core 2 Duo
Processor Speed: 2.4 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache: 3 MB
Memory: 4 GB
Bus Speed: 1.07 GHz
Boot ROM Version: MB51.007D.B03
SMC Version (system): 1.40f2
Serial Number (system): W89203U68QT
Hardware UUID: B0012B04-555B-55ED-9F13-B81486D1B049
There are only three small things to check to make sure you can run 8GB reliably on the Late 2008 MacBooks and MacBook Pros.
1.) You need the proper model machine: You have a Machine ID of MacBook5,1 – this is one of the models that are eligible, so you’re good there.
2.) You need the proper Firmware Revision: You have firmware revision MB51.007D.B03 – this is the proper firmware revision to run 8GB, so you don’t need to run the firmware upgrade – if you do, it’ll just say you’re already upgraded.
3.) You need to be running 10.6.8 or later: you didn’t say which version of OS X you’re on. An easy way to tell is to check your Apple menu – if there’s an option for the App Store, you’ve got at least 10.6.8
So, as long as you’re running 10.6.8 or later, you should be good to go.
Hi there I’m running osx 10.6.8 awesome thanks for the help and fast reply.
thank you for your support. I have a early 2008 macbook pro 15″ laptop. is there a way to get 8gb of ram? apple store the max is 4gb. when i talked to an apple tech in washington (main office), he had the same year and laptop as i do and he mention the max ram he was able to put in his was 6gb. he also install a 250gb sdd. do you have any idea how i can install 8gb of ram?
The early 2008 MacBook Pro 15″ models (Model ID: MacBook4,1) are OWC certified for up to 6GB of memory. This article does not apply.
Thank you for this great article, very precise and clear, I had just bought my 8GB upgrade kit and was about to upgrade when I read in my macbook manual that I could only put 2x1GB or 2x2GB….!!
I googled “macbook alu 2008 8GB” and found all the answers I could wish for on this page, thanks :)
Hey, by reading this article I decided to buy the 8gb Ram (2x2gb) for my Macbook Unibody Late 2008. My computer is currently running mountain lion and has Model Identifier: MacBook5,1 and Boot ROM Version: MB51.007D.B03 as specified. When I installed the 8 gb set my computer was unable to boot up. Hope I can recieve some advice from you guys.
Try re-seating the memory – if it isn’t making connection fully in the slots, the machine won’t boot. If that doesn’t solve the problem for you, please contact our Technical Support Team at 1(800)275-4576 via live chat or email and they will be more than happy to assist in troubleshooting.
I had the same issue as James had. I purchased an 8GB RAM upgrade after reading this article. My Boot ROM Version is MB51.007D.B03. My Model Identifier is MacBook5,1. I have Mountain Lion. I called tech support and was not able to find any solution after speaking with a representative for over an hour. Have there been other similar cases? Is it possible that this does not apply to Mountain Lion?
It’s not likely a Mountain Lion issue, as I am personally running the latest version of Mountain Lion with all the corresponding software updates on a MacBookPro5,1 (which was pretty much an identical update) and I haven’t had so much as a hiccup with booting, save for the need for an SMC reset due to a janky power supply.
Unfortunately, the Blog comments are not really designed for troubleshooting; you’d be better served via our techs (possibly through email, to prevent hours on the phone). However, let’s see what kind of “shotgun” solution I can offer.
Troubleshooting something such as this is mostly a process of elimination. Try taking your MacBook back to the OS version and memory configuration prior to the 8GB and Mountain Lion, then upgrade one piece at a time. Since the firmware is already applied, it shouldn’t change, but double-checking in System Profiler wouldn’t hurt.
TI’d recommend starting with the memory – one piece at a time – and see if you can boot after installing. Then, add the other piece. If that works then UPGRADE (don’t just swap in a different drive) to Mountain Lion and see if it goes well there.
Just to clarify – I should go back to Snow Leopard (which is what I had previously), install the RAM, and then upgrade back to Mountain Lion?
In order to determine where the failure is happening, it’s best to rebuild one piece at a time. So, yes, go back to Snow Leopard and your original RAM configuration. Make sure that boots and works normally. Then, add ONE memory module. See if that works. If it does, add the second. If 8GB works under Snow Leopard, try upgrading to Mountain Lion via the App Store (if you purchased, should be a free download again). Don’t just swap out the hard drive to a 10.8 drive – that could be the point of failure, too. The trick is to change ONLY one thing at a time. Swapping out the drives would change two things (OS version and the drive itself).
If it works, then… well… it’s working. If it fails, you will at least have a better idea where the troubles are occurring. At that point, a call to our Technicians should help get you on your way.
Hi Ike, did you find any solution to this? I’m facing the same issue. Thanks!
Hi James, did you find any solution to this problem? I’m having the same problem here. Let me know, pls. Thanks!
hi i just purchased an 8g ram card for my late 2008 macbook 13in and i was reading that you have to do something with the firmware, i am currently running mac os x lion 10.7.4 and the boot rom version is MB51.007D.B03 Would i have to do anything besides put the 8g ram card in? Thanks owc
As stated in the article, if you have a Late 2008 MacBook, and a firmware revision of MB51.007D.B03, your MacBook should be able to recognize 8GB of memory.
You would get this 8GB by installing a pair of 4GB modules, not a single 8GB module. This is the kit you would want.
Hi Guys-
I would like to upgrade the memory on my late 2008 Unibody Macbook. It has the 2.4 GHz processor, with 2 Gb of RAM; it is totally stock, including original OS it came with. Is an 8 Gb RAM upgrade possible for a newbie like myself? It sounds like I may have to upgrade the OS first. Is that true? If so, in what order should I perform what steps?
Thanks
Upgrading the memory is easy. First, make sure you’ve upgraded your OS to 10.6.6 or later. Next check the boot ROM version to make sure it is updated (the OS update should do this automatically, but better to check to be sure.) Then install your 8GB of memory by following our easy how-to video:
http://eshop.macsales.com/installvideos/macbook_13_unibody_mem/
Thanks! I will try that.
Since I am going to have to update the OS anyway, should I do it to a more recent OS, ie Lion, etc?
There’s really no reason not to as each iteration of OS X offers a better computing experience.
hi guys, thanks for all the research, and info.!! however i still have a question … i dont know much about computers, i do know, that i want the 8 gb ram (2 X 4 gb)*
today i’been told in best buy that i should not buy the crucial, or other brand, because they’ve been having trouble with that, and i should just buy the kingston. in the other hand they told me to buy the 1067 ghz.
the i went to comp-usa, and a technician told me that mac work better with 1066 ghz…!!
i have a late 2008 MBA.
so now im a bit confused, and i don’t know what to buy…. 1066 or 1067 ghz ???
It’s the same thing – 1066 or 1067 MHz – has to do with how the manufacturer rounds the actual speed (rounding vs. truncating the actual number). We suggest and support OWC Brand memory in those machines.
Hi! i use macbook 5,1 unibody and use 8 gb ram but my OS is still 10.5.8 and i dont find any problem in it (my firmwire is updated to those u said). The point is do i need to update my OS to SL/lion/mountain lion? what’s the effect if i only use 10.5.8 with updated firmwire but installed 8 gb memory ram?
thx in advance
sorry for my bad english
You must be running Snow Leopard or later to address 8GB on these systems, and our testing was done with 10.6.6, which is the earliest version we’re currently supporting for this. We do not support 8GB of memory under OS X 10.5.8 on these machines.
Hi, I’m new to this upgrading thing so I’m not sure what I’ll be doing to upgrade my Macbook.
I have a macbook pro late 2008 model 2.53ghz intel core 2 duo. Currently, I’m running Mountain Lion on it, and installed the efi upgrade to stop the internal flickering. From what I read so far, this should be sufficient to be able to upgrade my RAM. I’m just stating it to confirm that I can, so, can I upgrade my maximum ram to 8gb?
Also, if I can already upgrade with these specs, what kind of RAM should I get? Is there a specific type of RAM to buy?
Thanks!
Your 2.53GHz MacBook Pro “Unibody” 15″ – Late 2008 is MaxRAM Certified for up to 8GB of memory.
Visit the links in this comment for confirmation details of your computer, more information on the OWC MaxRAM Memory Certification Program, and the correct memory for your machine.
Hey OWC, I just ordered 8gb of RAM from you guys yesterday, and it stemmed from me recommending a friend to your site. I started looking around and ran across this fact that I could update my late 2008 unibody. Just wanted to say thanks for doing such a kickass job at what you do. I’ve been using and recommending your site since about 2007-08. You guys have consistently done a great job and have been so trustworthy. I was steered to you guys from an Apple Care tech back then and it was the best Mac advice I have ever received. Keep up the great work guys!
can i also update my late 2008 macbook aluminium? it matches the id requirements, but is not listed.
The Apple MacBook “Unibody AL” – Late 2008 (Model ID: MacBook5,1) is MaxRAM Certified for up to 8.0GB of OWC memory.
Is 8GB of RAM 1333mHz okay for the Macbook Alum Unibody? Sorry, i havent got any concrete answer if this will work to replace the original 1067MHz RAMs..
The MacBook Aluminum Unibody uses PC8500 DDR3 1066MHz SO-DIMM memory, not the PC3-10600 DDR3 1333MHz SO-DIMM memory.
I have an old MacBookPro1,2
Intel Core Duo,
2,16 GHz
(MacBook Pro (17-inch) MacBookPro1,2 MA092xx/A 17″/D2.16G/1G/120/SD-DL)
Do you think this would be able to run more RAM than the 2GB it holds maximum?
The MacBookPro1,2 is MaRAM Certified for up to 2GB of memory.