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Question: iMac RAM Issues

My system:

iMac Mid 2010 21.5 Inch

3.2 GHz i3

macOS 10.13.4


As my mac was slowing down, I decided to replace my dual 2 gigabyte ram modules with one stick with 8 gigabytes of ram. Problems occurred after I took out the existing ram modules and replaced them with the new module. The mac boots up normal, but then starts to restart after I open up a program and leads to a screen saying the mac restarted because of a problem. For background information, I also replaced my old 1tb hard drive with a 2tb SSD with a fresh install of High Sierra.

New Ram Specs: Corsair MacMemory DDR3 1333MHz CMSA8GX3M1A1333C9

It would be appreciated if a solution could found as I can't return the 8 gigabyte stick I purchased.

iMac, macOS High Sierra (10.13.4)

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Question marked as Solved

That model can accept a total of 16gB of RAM, but in 4 slots, which would indicate a maximum of 4 gB per slot.

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May 27, 2018 9:20 PM in response to Seediest In response to Seediest

Well, here is the site (one of two most recommended RAM vendors):

OWC Performance Upgrades for iMac 2010

As you can see, only 27" models can handle more than 16 GB.

I've never used Corsair, so I have no opinion on that brand; I do trust macsales as they are Mac-centric and test the RAM for the particular model(s) they recommend it for. I would return the Corsair and purchase the 4 x 4 GB kit from OWC.

May 27, 2018 9:20 PM

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Question: iMac RAM Issues