Introduction

This guide will help you replace the RAM.

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.
  • 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.

I am going to put a very important comment here. Before you start this process listen to the fans on your iMac do any of them sound obviously loud (think about how quiet your iMac used to sound as a reference) If you notice one or more of them sounding substantially loud compared to the others consider locating a replacement fan prior starting this process. After all if you are already “in the neighborhood” it is a shame to do all this work only to have to disassemble your imac a couple weeks later because you realize the fan is failing. I speak from my own personal learning experience of having to disassembly my iMac 3 weeks later because the HDD was failing and apparently the moving the fan around was just enough to push it to start really under performing.

Wizbang FL - Reply

Deck the Halls
With tools and Fix Kits
Use your fingers or the tip of a spudger to slide the black plastic RAM tray pull tab out of the RAM slot.
  • 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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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.
  • 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).

How many 4MB cards can I install?

nowsc - Reply

None. 4mb ram is too old to fit into any computer manufactured after like 1998.

Brett Davison - Reply

@Brett

I suggest that you learn your unit symbols before you try to appear clever:

4mb == 4 milli bits

4MB == 4 mega bytes

nowsc was obviously meaning 4GB not 4MB, try not to be a dick.

Simon - Reply

Take care to note which way out the RAM comes - there is a notch in each RAM and it is not centered, therefore either the notch will be on the left or to the right (depending on which way up you have your iMac). This will make it easier to replace the RAM without damaging anything.

Mike Haines - Reply

If damaged the notch inside one pair of RAM slots, is it fixable ?

Gavriil Bordyukov - Reply

Conclusion

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

54 other people completed this guide.

Phillip Takahashi

Member since: 08/22/2011

69,659 Reputation

134 Guides authored

5 Comments

My iMac 21.5-inch Mid 2011 has EMC 2428, but still directions turned out to be the same.

I replaced the memory in my MacBook Pro, and used the old cards (2x2GB) to fill out the 2 empty slots that apple left empty, doubled the memory of 2 machines for the price of one ^_^

Mabel Xu - Reply

Thanks ifixit team, I did it. It is really piece of cake! Thanks again!

prelude0214 - Reply

What's the real max capacity for the RAM?

Angel Pimienta - Reply

16 Gb (4 x 4 Gb) DDR3 1333 MHz

Aleksei Marinichev -

Hi, can I add one Ram of 4MB and one of 8Mb?

Cristian Catanescu - Reply

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