OWC’s Upgrade for Apple 2013 iMac 27” Expands Memory To 32GB

PR_iMac2012_32GBmemoryOther World Computing  announced the immediate availability of the OWC Memory Upgrade Kits from 8GB to 32GB for 2013 iMac 27” models that became available today. OWC’s kits offer memory configurations not offered by the factory as well as savings of more than $240 compared to same-size factory options. Like all OWC Memory Upgrade Kits, a ‘how-to’ install video and OWC Lifetime warranty are included.

What it does: upgrading the memory of this iMac gives you more options, better performance and it’s a low-cost improvement that gives Apple’s latest OSX—including the upcoming Mavericks release—the space it needs for maximum performance. For hundreds less than what Apple charges, users can select an OWC upgrade to unlock the machine’s true potential. Installation takes just a few minutes, and OWCs iMac Memory Upgrade Guide makes it easy to select the right memory for any Apple iMac model.

Why it’s cool: this is one of easiest Macs to upgrade and, just like the original 2012 model, a memory access panel on the rear of the 2013 model iMac 27” provides access to the RAM slots. Adding more memory is fast and simply involves installing new modules into the memory slots, then reinstalling the access panel. Therefore, Mac performance experts recommend selecting the least amount of factory installed RAM when ordering an Apple 27″ iMac.

What it costs: New iMac owners seeking to max-out the RAM can select the $359.00 32GB OWC memory upgrade and save over $240 compared to the 32GB factory cost of $600. For even more savings, iMac owners can trade-in the two factory base 4GB memory modules.

OWC memory upgrades for Apple 2013 iMac 27” 2.9GHz/3.2GHz i5 Models and 3.4GHz i7 Model:

  • 8GB (2 x 4GB) PC3-12800 DDR3L 1600MHz Upgrade Kit with Lifetime Warranty. $97.99

Add to existing 2 x 4GB factory-installed modules for 16GB total memory. Offers over 50 percent savings vs. factory installed 16GB option.

  • 12GB (4GB + 8GB) PC3-12800 DDR3L 1600MHz Upgrade Kit with Lifetime Warranty. $131.99

Add to existing 2 x 4GB factory-installed modules for 20GB total memory. Note: this is not available as a factory-installed option from Apple.

  • 16GB (2 x 8GB) PC3-12800 DDR3L 1600MHz Upgrade Kit with Lifetime Warranty. $179.99

Add to existing 2 x 4GB factory-installed modules for 24GB total memory. Offers over 50 percent more memory and 10 percent savings vs. factory-installed 16GB option.

  • 32GB (4 x 8GB) PC3-12800 DDR3L 1600MHz Upgrade Kit with Lifetime Warranty. $359.00

A 40 percent savings vs. factory-installed option.


  • does anyone know if the 21.5″ late-2013 iMac be upgraded to 32Gb with two 16Gb DIMMS? please let me know…thank you!

  • Has anyone installed 32GB upgrade in New late 2013 3.5 Ghz I7 IMAC? Working fine with no problems? For more than a few days? I am anxious to upgrade as soon as I can confirm compatibility. Thanks!

    • Shipped thousands of the 1600MHz kits for the new 2013 iMacs and we only ship what works – we actually test and maintain these systems in house for ongoing certification too. Outside of Apple I do not believe anyone has the kind of test lab facilities we do with respect to the both the variety and quantity of Macs we maintain for this ongoing quality and certification process. :)

  • Hi,

    Suppose I purchase one of the new 27″ iMacs (just released in Sept 2013) with 8 GB of RAM (2 x 4GB). If I purchase your 16GB upgrade kit (2 x 8GB) to upgrade to 24GB total, will there be any issues?

    This would to a config something like:

    Slot1 4 GB
    Slot2 4GB
    Slot3 8 GB
    Slot4 8 GB

    I remember reading something some time ago that if the size of the RAM modules in all slots wasn’t the same, the memory bus had to slow down a lot to handle it for some reason. So you’d have more memory but it would be faster. Thus was a good idea to always have the same size memory module in each slot.

    Is this still true or is this old or not applicable to iMacs? Not sure if it was the cpu or the motherboard that imposed this limitation but I just thought that I’d check.


    • In general, there is a benefit to dual- or triple- channel memory addressing as found on many modern machines. However, we’ve benchmarked it, and in every instance having more memory overall is better than having the same amount in each slot.
      The only exception to this is the earlier Mac Pro models where matched pairs is a requirement.

  • A lot changed with the 2012 model… a lot that was form over function imho… But also some core hardware changes as independent of that. We will soon have at least one internal upgrade support element for these 2012 and 2013 models… and that should just be the beginning. If Apple actually wanted these units to be upgradeable – be a much shorter dev cycle. :)

  • Any hope of OWC storage upgrades for the ’13 or even ’12 iMacs? A turnkey option to upgrade the included drive and add an OWC PCIe SSD drive would be great. But we haven’t seen anything even for the 2012 model.