“Secret” Firmware lets Late ’08 MacBooks use 8GB.

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:

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.


LEAVE A COMMENT

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  • Hi, just want to know
    My macbook have spec
    13-inch, aluminium, late 2008
    Proc 2,4ghz core 2 duo
    Memory 8gb 1333 mhz ddr3 –> ???

    Why my mac still working quite well?
    Or should i change to 1067 mhz ddr3 for the best result?

    Thanks




  • Just wanted to be sure I could upgrade to 8GB…

    13-inch, Aluminum, Late 2008
    Processor 2 GHz Intel Core 2 Duo
    Memory 2 GB 1067 MHz DDR3
    Software OS X 10.9.4 (13E28)
    Boot ROM Version: MB51.007D.B03
    SMC Version (system): 1.32f8

    Thanks




  • Hi, can this article be updated to include MacBook 5,2 ?
    my 2.16GHz has boot rom version MB52.0088.B06 and is currently using 4GB DDR2 @ 800MHz… i’d like to upgrade it to 8GB if possible.




  • Hi, I have a MacbookPro 5,5 (Mid-2009, 2,53GHz Intel Core 2 Duo) with Boot ROM Version: MBP55.00AC.B03, will it access/use 8GB of RAM ?? Im ruuning OS X 10.8.5 (12F45). Thanks in advance




  • Hi, I’m planning to upgrade my Macbook’s RAM to 8gb. I have a late 2008 model with the following specs which I believe is sufficient for the 8gb upgrade:

    Model Identifier: MacBook5,1
    Boot ROM Version: MB51.007D.B03

    However, I’m kind of having a hard time finding a 4gb 1066mhz SODIMM module, would it be possible to use a 1333mhz instead?




  • I purchased 4GB×2 (PC8500 DDR3 1066MHz) for my MacBook 13-inch Late 2008 (MacBook5.1) with the Boot ROM version of MB51.007D.B03. It’s running Mac OS X 10.6.8.
    I’ve been trying to follow this article evrything matches up as close as I can.
    But I encountered a difficulty.

    1. When I put the two 4GB ram into the slots and start it up the MacBook makes 3 beeps and does not start.
    2. I tried one 4GB ram into the upper (lower) slot — the result is same as 1.
    Tried for the other 4GB ram — the result is same as 1.
    3. I tried with one 4GB ram and one of my original 2GB ram and it started fine showing 6GB of ram with any combination of new and old.
    4. I tested 3. with both new 4GB ram but it begins to beep again.

    4 4 – 4 2 2 2 – [GB] — upr slot
    4 – 4 2 4 2 – 2 [GB] — lwrr slot
    – – – 6 6 4 2 2 [GB] — total of ram

    Any ideas?
    Thank you.




    • I am sorry to hear about the issues. 3 beeps is the computer POST (Power on Self-Test) saying it thinks the RAM is faulty.

      I recommend trying to clean the memory module. Take a clean pencil eraser and gently rub it along the metal contacts on the memory and follow that by using a microfiber towel along with rubbing alcohol to clean the metal contacts on the memory, this should insure that the memory is getting a solid contact with the computer

      If that doesn’t resolve the issue the RAM is likely faulty and needs replaced under warranty.




  • Hello, I am unsure if i should upgrade my Macbook pro 15 inch late 2008 model.

    MacBook Pro 5,1
    2.4 GHz
    2GB 1067 MHz DDR3
    Boot ROM Version: MBP51.007E.B06
    OS x 10.8.5

    I double checked the Boot ROM Version by trying to do the EFI update and it states my laptop does not need the update.




  • Hi there!

    I have a 2009 MacBook With model identifier 5,1. However according to an article, which seems to reference you, I need a Firewire port and a SD slot and NOT a thunderbolt. Now funnily enough, I have none of them. Can I still upgrade from 4GB to 8?




  • Hey there….I have a late 08 aluminum 4GB (i think its 2×2GB)macbook 2.4 model A1278 (and I think its DDR2).Im not computer savvy at all but both memory slots are taken. Im alittle unsure if it has 4 or 8 Gb of ram currently because the order paper work I have just says 4GB MACBOOK and im not sure if it meant with one or two modules.
    Ok …so… It started beeping 3 at a time… so I went apple and they confirmed that my ram went bad.
    Id like to upgrade to the 8GB if possible…but I dont know what the boot rom is because I cant get it to start up. Thus…I cant download the EFI UPDATE….SO …i was wondering if I needed to get the proper 2×2GB first in order to do the upgrade if possible. And when I do upgrade the ram….what exact module should I be lookin for…..my current modules have a label with “2GB 2R×8 PC3-8500S-7-10-F1″….and I have no idea what that means really……im thinking I should be looking to get 2×4GB PC3 8500 (OR HIGHER?) DDR2 …..is that right? Can I get a DDR3?
    Sorry about all the uncertainties…..as you can see im more than slightly confused…..lol! Im new to this ram stuff….




    • It is best for you to contact our Sales team with your computer’s serial number to be 100% certain of which model computer you have.

      It does sound like you have a MacBook5,1 which is compatible with 8GB of RAM if the latest firmware is installed (as detailed in this blog). If you stayed on top of installing your system updates then the update would have been installed automatically.

      A MacBook5,1 uses DDR3 1066Mhz memory and all compatible upgrades can be found here




  • After reading this article I purchased and 8GB upgrade kit for my Macbook 13″ late 2008 unibody, or MacBook5,1 as its put above.

    I’ve been trying to follow the article as close as I can, everything matches up. It is a 2.4ghz model and had 4GB of memory installed when I bought it. It’s running OSX 10.9.4.

    When I put the two new 4GB ram into the slots and start it up the macbook makes 3 beeps and does not start.

    I tried with one 4GB ram and one of my original 2GB ram and it started fine showing 6GB of ram. I tested this with both new sticks but when I put both of them in it begins to beep again.

    Am I doing something wrong? I’m kind of new at RAM upgrades. Thanks for the help!




    • I’m sorry to hear this isn’t working smoothly. The first thing to do would be to try the EFI update to to make sure you have the new version, not the older version with the same name.

      Second is to test each of the 4GB modules with a 2GB. If one doesn’t work, try cleaning the contacts by using a clean, soft pencil eraser to rub gently along the contacts on both sides of the modules. You can also use a Q-tip and rubbing alcohol instead, but you need to let it dry afterward.

      Third is to install the 8GB kit and reset the SMC and PRAM together in that order.

      If all else fails, please contact our tech support team via phone at 800-869-9152, or 815-338-8685 internationally; by chat; or by e-mail.




  • I have a macbook 2008 late. My macbook is Macbook 5.1. And a Boot ROM version is MB51.007D.B03.
    Can I upgrade memory to 8 GB with 2 x 4GB DDR3-1333 PC3 10600, not 4GB DDR3-1066 PC3-8500? Thank you.




    • We recommend using memory of the speed the Mac is designed to take. As long as you are using the correct generation of memory (DDR3, DDR2, DDR) for your machine. You can technically use different speed memory, but it adds unnecessary variables and potential compatibility problems while not really giving you any benefit. The one notable exception is the 2011 MacBook Pros.




  • Hi all,

    Just want to thank the following (OWC Grant) for the creation of this article, it has helped greatly with the 13″ MacBook (late 2008 model) that I inherited.

    I have a few questions on the following if you can please address for me.

    1. MacBook is currently on OSX Version 10.8.5 (Mountain Lion). Put a copy of the OSX on an 8gb thumbdrive for copy.

    I have purchased the following for the laptop off Newegg:
    a. PNY XLRB PRO 240GB Internal Solid State Drive (SSD) http://www.newegg.com/Product/Product.aspx?Item=N82E16820178453
    b. G.SKILL 8GB (2 x 4GB) DDR4 Laptop Memory
    http://www.newegg.com/Product/Product.aspx?Item=N82E16820231294

    After reading the article, it looks like I will be fine with the 8GB. Just want some input from you guys on the hardware I purchased is adequate for this MacBook. Basically going to be used for Outlook and Gmail email, Microsoft Project and Office, etc.

    2. Should I upgrade to Mavericks on the following? I’ve done some research on this with the 2008 model and have seen mixed results.

    Thank you for the help, it is greatly appreciated!




    • We are glad to hear this article helped you! We cannot really comment on non-OWC products in terms of quality, but as for the performance for Outlook, email, Office, etc. 8GB of memory will do very well. The one thing you want to be wary of is the SSD. Late 2008 MacBooks, and many of the late 2008-2010 Mac machines, have trouble with 6G drives of any kind, both SSD and hard disk based. In these machines, those will only perform at SATA Revision 1.0 (1.5Gb/s, 150MB/s) speeds rather that the SATA Revision 2.0 (3.0Gb/s 300MB/s) speed the computer can deliver. The compatibility information on our 6G SSDs has further details. Because of this we recommend use of 3G SSDs in these systems.

      As for Mavericks, that is really up to personal preference and the applications you are using. Some newer software requires the latest OS, but otherwise it really depends on if the new features sound appealing and useful to what you are doing.




  • I have a macbook 2008 late. My Macbook is MacBook5,1. And a Boot ROM version is MB51.007D.B03.
    Can I upgrade to 8gb ram with DDR3-1333 PC3 10600? Thank you so much.




  • Guys, thanks & great job on this article. It’s still relevant three years later. Sorry if this has been beat to death already, but your update comment at the end of the article:

    “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.”

    … sort of makes it sound like (i.e. “does not disable”) it is dependent on the upgrade having already been in place. Can you confirm that the code to support 8GB is included in MBP51.007E.B06?

    Background info, I installed this upgrade a while back and I just noticed that I’m failing memory tests in the last couple of GB. Probably a bad chip and a coincidence, but I thought I’d verify.




  • Does anybody know if this firmware update also allows the “Early 2009″ Macbook (MacBook5,2 MB52.0088.B05) to support 8gb without any slowdown?




  • Hi

    I have my boot rom at MB51.007D.B03 and even tried to reinstall the firmware but it won’t let me. I can use 6gigs no problem and have checked with 8 but I get crashes and eventually the machine stops booting. I’m just borrowing someone’s ram to test the suggestions above. Any idea what I can do to manually install the update like you suggested you did above so I can get some ram myself and upgrade?

    Thanks
    Cian




    • I’m sorry to hear about the trouble with that. You can find the EFI update here. It should work and help with this. If it still doesn’t work try also updating the SMC, which can be found here.

      If the EFI update from that download tells you it isn’t needed, it would be best to contact Apple for further instructions on making sure your computer has the “newer” EFI update of that version.

      If everything is properly up to date and it still doesn’t work, check the RAM you are using and make sure it is compatible. You may also want to clean the contacts just to be safe. To do that please use a clean, soft pencil eraser and rub gently along the contacts on both sides of the modules. You can also use a Q-tip and rubbing alcohol in place of the eraser, but you need to let it dry afterward.

      If that still gives you trouble, please contact our tech support team via phone at 800-869-9152, or 815-338-8685 internationally; by chat; or by e-mail.




  • Model Identifier: MacBookPro5,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2.53 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

    Looks like I can upgrade to the 8gb of RAM. DDR3, 1066Mhz right? Any issues with using a SSD with the increased RAM?




  • Before I buy the 8gb for my macbook to make more room for photography work, will this one accept more memory?
    Model Name: MacBook
    Model Identifier: MacBook4,1
    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: 800 MHz
    Boot ROM Version: MB41.00C1.B00
    SMC Version (system): 1.31f1
    Serial Number (system): W8824NDB0P1
    Hardware UUID: E649336D-17A1-5D0D-AD9F-C70D501270EA
    Sudden Motion Sensor:
    State: Enabled




  • Could a 16GB of ram upgrade be performed by any chance?




    • For these machines, 8GB is the max.




      • Aha!
        Ok Thanks. One more question, my Macbook Aluminium 2008 has a broken keyboard and id like to replace it. Could I just get a Macbook Pro late 08 keyboard to replace mine with? Or does it HAVE to be specifically for my Macbook?
        Thanks :)




        • The MacBook Pro Late 2008 models came in 15-inch and 17-inch varieties only. The first 13-inch MacBook Pro was the Mid 2009 model, and that keyboard could be used in the Aluminum 2008 MacBook model.

          However, depending on which Model MacBook you have the keyboard markings were slightly different. The 2.4GHz model had an illuminated keyboard (just like the Pro 2009 model) but the 2.0GHz did not (and thus the 2.0GHz model wouldn’t have the accompanying brighten and dim backlight function keys. You could install it into the 2.0 model, but the backlight functionality wouldn’t work.




  • I just tried running the 1.8 firmware update and received a message that I do not need it. I just ordered the 8GB RAM to upgrade and was going to update the firmware before it got here. Do I have to wait to update firmware?

    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




    • You do not need to wait to run the update. The update was most likely run automatically in the background, so your computer will be ready to go with the 8GB of memory when it arrives. The boot ROM version you have is different than what is in the blog, but it is possible it is a newer version than what is necessary. If you do have any trouble with the memory when you receive it, please contact us at 800-275-4576, by email, or by chat.




  • Thanks for such a great/informative article. After updating my MacBook5,1 (4GB RAM) to Mavericks, I have been experiencing sluggish performances quite now and then. So, I was wondering if I can upgrade the RAM to 8GB, which I will certainly do now after reading this article.




  • hi! i would like to know if the 2008 late mac will take full advantage of the 8gb of ram.. isn’t the main board limited to 4gb or something? im a noob ok, my question is, will it be good deal for the money or i will be ok with 6gb ram;

    THANKS




  • Model Identifier: MacBook5,1
    Boot ROM Version: MB51.007D.B03
    SMC Version (system): 1.40f2
    Software OS X 10.9 (13A603)

    I tried installing 8GB of Corsair CMSO8GX3M2A1333C9. It didn’t work. I ordered a replacement thinking it was faulty memory. Still didn’t work. Two different sets of errors though. The first couple resulted in long beeps. The second pair just kept spinning the optical drive without any beeps.

    I tried also resetting the SMC and PRAM. No luck.

    Any advice?




  • Hi,

    My specs have Boot ROM Version: MBP51.007E.B06 (not B.03) and I am running Maverick, is this going to make a difference in relation to the certification for 8GB RAM?

    Thanks




  • Hi i was wondering if I can run 8GB on my late 2008 MBP. Using Mavericks now. Thank you for help and advice.

    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
    Sudden Motion Sensor:
    State: Enabled




  • Model Name: MacBook
    Model Identifier: MacBook5,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2 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: MB51.007D.B03
    SMC Version (system): 1.32f8

    Operative System Version: 10.9.1

    The upgrade to 8bg RAM doesn’t work.

    Any ideas?

    Thank you.




    • You have the proper firmware to run 8GB (2x4GB) of memory. I recommend trying to clean the memory module. Take a clean pencil eraser and gently rub it along the metal contacts on the memory and follow that by using a microfiber towel along with rubbing alcohol to clean the metal contacts on the memory, this should insure that the memory is getting a solid contact with the computer

      If that doesn’t resolve the issue, I would try both and SMC and PRAM reset.

      SMC reset: http://support.apple.com/kb/HT1411

      And

      PRAM Reset:
      1) Start the machine while holding down the Option-Apple-P-R keys

      2) Wait until you hear the 3rd startup chime, then let go of the keys and let the machine boot up.

      If you continue to experience issues please contact our tech support




  • Will it bugger my MacBook (late 2008) if I use the faster RAM, 1333 vs 1066, and is there any real value to the faster RAM if the bus speed bottlenecks things at 1066? I am running OS-X 10.9.1.

    Cheers,

    Elvis Vincent
    IMOM




  • Sorry if already Asked & Answered, but is faster RAM supported, such as PC3-12800 SODIMMs? I’ve generally not had an issue using faster RAM in desktops since the Bus will make them operate at slower speed ratings anyway. And if in this case those matched sticks won’t work, what is the fastest RAM that will function properly?




    • We only offer and support 1066Mhz memory for the Late ’08 MacBooks. All speeds of DDR3 are suppose to be backwards compatible with each other, so theoretically 1333Mhz memory would down clock to the proper 1066Mhz speed. Doing this would be of no benefit to the performance of the computer and only leaves the door open for issues to be created.




      • I tried replacing RAM in this machine using some 1333MHz DDR3 (Corsair) and it failed… but that RAM also failed in a MacBookPro6,2 as well as MacBookPRo5,1. Your mileage may vary. It definitely worked with Samsung 1066MHz PC8500S DDR3




        • MacBook5,1 (Aluminum Unibody Late 2008) is especially very specific about what kind of RAM module is placed in the first RAM slot – it must always be exactly the same as is in the specs by Apple. In the other slot can be almost anything including 1333MHz RAM modules.




  • Awesome post!

    Running Mavericks on a late 2008 Macbook 5,1 2Ghz

    Boot ROM is MB51.007D.B00.

    Does it need to be upgraded in order to use 8GB RAM? In the article you say it should be MBP51.007E.B05, but the current version on the applie site is listed as MB51.007D.003.

    Help!




    • It is the difference between MacBook & MacBook Pro that is causing the confusion here:
      MBP51.007E.B05 is the correct version for For MacBook Pro models (MacBookPro5,1).
      MacBooks with a Model ID of MacBook5,1 should have a Boot ROM version of MB51.007D.B03 as listed on Apple’s site.




    • Hey Nick,

      How is Maverick running on your ancient Macbook? I have the same awesome model and looking to see if I should upgrade to maverick or stay with snow leopard. Also did you ever add that 8gb of ram and if so how is that working for ya? Also looking to upgrade in this department too. Thanks for your help much appreciated.




  • hi
    can this mac run with 8gb ram
    Model Name: MacBook
    Model Identifier: MacBook5,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2 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): W8911GYV7WU
    Hardware UUID: 90A24162-9082-549C-A35E-7135586796F4
    Sudden Motion Sensor:
    State: Enabled




  • Thanks for making this clear. I’m a tech power user, but we get into ROM versions and you start to lose me. The flow chart at the end was exactly what I needed. I saw that I have MacBook4,1 and that settled it: 4GB is the max for me. Good work guys! I guess I’ll be getting a whole new system. Shucks! My disappointment is indescribable!




  • Hi,
    these are my features of my macbook running 10.9.

    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: 2 GB
    Bus Speed: 1.07 GHz
    Boot ROM Version: MB51.007D.B03
    SMC Version (system): 1.32f8

    can upgrade to 8GB?




    • Your model of MacBook is fully certified for 8GB of memory




      • Hello and thank you for your answer,

        by your message i undestand that i don’t need any extra firmware update to make the 8GB right?

        Thanks!




        • That is correct. No firmware update is needed for your model.




          • Jarrod,

            I have exactly the same late 2008 Macbook as “Markov” and it has the updated firmware (Boot ROM Version: MB51.007D.B03). He asked if he could upgrade to 8GB Ram and you said YES on 12/17/13 — no need to upgrade the firmware. That is very encouraging.

            I currently have 6GB ram in my laptop and would like to boost it to 8GB. My question is, can I replace the current 2GB chip with a 4GB chip that was used in my mid-2012 Macbook Pro. I bought this 4GB chip from OWC quite some time ago and have recently upgraded to 16GB. So, I have two 4GB chips available. Both are DDR3 SDRAM chips.




    • Hi there,

      my wife’s Unibody Macbook 5,1 is running following setup:

      Boot-ROM-Version: MB51.007D.B03
      SMC-Version (System): 1.32f8

      Software OS X 10.9.1 (13B42)

      It really just has 2 Gigs of RAM, I just tested the 4 Gigs out of my Windows Laptop.

      So system wise I should be good to go. Is there anyway of determening if I habe the “too early” or the late EFI version?

      I will order RAM soon, just would like to know if I will habe to fiddle with the system more than that.

      Thanx to all.

      Chewie




  • Hi,

    I decided to upgrade the 2x 2GB memory. 10.9 Maverick seems to be really slowing down my MacBook… I purchased 8GB DDR3-1600 and got to work. Installing the sticks was easy, but after piecing everything back together and booting up, I got 3 beeps pretty much instantly. Switched the 2 4GB sticks around, no success. Running 1 stick at a time would not work either.

    I’ve tried several combinations and I found that the 4GB would not work in BANK 0/DIMM1, only in BANK 0/DIMM0. So I have now set up the original 2GB in BANK 0/DIMM1, and the 4GB in BANK 0/DIMM0. Resulting in 6GB.

    Any thoughts on what might be the problem? If I switch back to 2x 2GB there are no issues with either of the banks.

    Macbook5,1 (2008 Late)
    Intel Core 2 Duo
    2 GHz
    6GB RAM (1x 2GB original Hynix & 1x 4GB DDR3-1600)
    Boot ROM MB51.007D.B03
    Running OSX 10.9




  • I’m having the same issue as Eathan Bell:

    Model Name: MacBook
    Model Identifier: MacBook5,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2 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

    When I attempt to install, I get “Your computer does not need this update”.

    Has anyone tried this on 10.9 without having done the EFI update? Success?




  • @Eathan Bell, maybe you didn’t read this entire article, but you need to update your boot rom. Its 4 versions to old. Here is the latest version http://support.apple.com/kb/DL1502

    Then I would do a clean install to Mac OS 10.9 Mavericks when it comes out later today.

    And finally after a fresh install do a restore from a Time Machine backup.




  • Having an older OS then Snow Leopard will not affect the ability to install 8GB of memory. It sounds like you have some defective memory. I would recommend running Apple Hardware Test or Rember to see if the 8gb of memory tests defective.




    • Thanks for the suggestion. I went into Single User mode, did a memtest with both sticks in, and got some “Data Mismatch” errors. After consulting Googe, someone on another forum mentioned to do a memtest with each stick at a time. I did just that, and found out that only the one stick had the errors. For now I am using the working 4GB stick and an older 2GB stick, and it works just fine. I know it’s recommended that you upgrade both sticks at a time, but for now this will do. Thanks for the help. :D

      Btw, is that other stick just unusable, or is there anyway to recover it?




  • Quick question, am I able to still do this if I have a newer OS clean installed? Meaning Snow Leopard was not on the hard drive before install. Mountain Lion in my case.

    My specs:

    Macbook5,1
    Intel Core 2 Duo
    2 GHz
    4GB RAM
    Boot ROM MB51.007D.B03

    I bought some Mushkin Apple memory, 8GB(4GBx2) of course as the article is regarding. Installing it worked fine, no three beeping as others have had… but after a while I noticed slow downs and some even odder things, like files seemingly disappearing and programs not opening because of missing files. This was about a week after using it. I put back in the 4GB RAM and everything is fine now. Is this because I didn’t have something installed that Snow Leopard would have had, and Mountain Lion doesn’t have now? Or is it just because I maybe need to wipe my hard drive, install a fresh OS, and go from there? Should I try to just run 6GB of RAM?

    Also, resetting the PRAM did nothing.

    Thanks in advance for any advice.