iMac Intel 27" EMC 2309 and 2374 RAM Replacement

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Featured Guide

This guide has been found to be exceptionally cool by the iFixit staff.

iMac Intel 27" EMC 2309 and 2374 and 2390 RAM replacement.

Upgrade RAM modules for an instant boost in speed.

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Edit Step 1 Access Door  ¶ 

  • Loosen the three Phillips screws securing the access door to the bottom edge of your iMac.

  • These screws will remain captive in the access door.

  • Remove the access door from your iMac.

  • During reassembly, fasten the access door loosely and align it with the pocket cut into the outer case of the iMac before fully tightening the screws.

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Edit Step 2 RAM  ¶ 

  • Use your fingers or the tip of a spudger to slide the black plastic RAM tray pull tab out of the RAM slot.

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Edit Step 3  ¶ 

  • Pull the black plastic tab away from the iMac to eject the RAM chip from its socket.

    • The RAM modules are firmly seated and may require a fair amount of force to remove.

  • Use your fingers to slide the RAM chip out of its socket.

  • If necessary, repeat this process for the other RAM module(s).

To reassemble your device, follow these instructions in reverse order.

For more information, check out the iMac Intel 27" EMC 2309 and 2374 device page.

Required Tools


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Phillips #1 Screwdriver

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Comments Comments are onturn off

Interestingly, the mid 2011 iMac 27 inch also goes to 12GB!

I originally thought I'd be upgrading to 8GB today but found 4 slots instead of 2 :-)

As long as the two front (close to the screen) slots are paired with the exact same RAM config.

For example:

Two front slots Apple 2GB chips = 4GB.

Two rear slots, Crucial Lexar 4GB chips = 8GB

Total 12GB

Hoorah no waste and more RAM, come on Lion... I'm Ready!

Lucifer, · Reply

Need a#0 screwdriver, not #1

vince Greco, · Reply

Be sure to really push the RAM all the way into the socket. I had a "no RAM" error beep when I first booted up my iMac after doing this. Just an extra two millimetres was all it needed to be properly installed. It can be quite tough to get in.

Magda Stremeski, · Reply

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