Upgrade RAM modules for an instant boost in speed.

Image 1/2: These screws will remain captive in the access door. Image 2/2: Remove the access door from your iMac.
  • 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.

Add Comment

Image 1/1:
  • Use your fingers or the tip of a spudger to slide the black plastic RAM tray pull tab out of the RAM slot.

Add Comment

Image 1/2: The RAM modules are firmly seated and may require a fair amount of force to remove. Image 2/2: Use your fingers to slide the RAM chip out of its socket.
  • 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


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


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

40 other people completed this guide.


iFixit Member of iFixit


127 Members

5,780 Guides authored


Super easy! I'm not exactly an experienced fixer, but this replacement took no effort at all. (I also replaced the battery of my iphone 4S: that was much much much harder)

Tessa - Reply

My wife's ageing iMac currently has 4x2GB, and it is creaking under even light use (on Mavericks... haven't dared upgrade any further yet).

I want to initially upgrade it to 2x8GB, which seems nice and easy. My question is is it then possible to add one more 8GB for a total of 24GB, or would I need to add 2x8GB for a total of 32GB? Will the iMac see and use 3 RAM modules, or does it need to be an even number, like in the old PC days?


Clive Murray - Reply

Maximum memory: 16384MB. See crucial for more information :*2ghz-intel-core-i3-%2827-inch---ddr3%29-mid-2010

Frederic Morelli -

Easy mode. Note that the bits is called PZ1 most screwdriver sets. Also known as Japanese Phillips, the bid comes to a + instead of to a point. A 2.0 flathead will also turn the screw.

Oh and, don't forget to check your black flats back in. Otherwise you'll get too funny little appendages sticking out the bottom when you reattach your access door :)

Kevin McCartney - Reply


* firstly you may have to pull twice on the tab to release both RAMs as sometimes the first slot gets a little stuck.

* secondly - I've been having some trouble with different RAM chips - can anyone please tell me the definitive answer for how much RAM each slot will take, and what speed and latency? My iMac seems "finicky" about brands too!!!

Mike Haines - Reply

I get that theres a 16G max.

Can I mix chips of different size?

Example 1: 2X2G + 2X4G

Example 2: 2X2G + 1X8G +1X4G

I'm trying to figure if I can just add to existing memory or if I should just bite the bullet and install all new.

Also should I worry about matching the brand of chips?


luis - Reply

Add Comment

View Statistics:

Past 24 Hours: 12

Past 7 Days: 65

Past 30 Days: 309

All Time: 21,678