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iMac Intel 27" EMC 2639 RAM Replacement

What you need

  1. iMac Intel 27" EMC 2639 RAM Replacement, Open the RAM door: step 1, image 1 of 2 iMac Intel 27" EMC 2639 RAM Replacement, Open the RAM door: step 1, image 2 of 2
    • While holding the display steady, use the flat end of a spudger to press in on the RAM door release button, located just above the power port.

    • You may have to press fairly hard—keep at it until the bottom of the door pops out about 0.25" from the rear of the iMac.

  2. iMac Intel 27" EMC 2639 RAM Replacement, Remove the RAM door: step 2, image 1 of 3 iMac Intel 27" EMC 2639 RAM Replacement, Remove the RAM door: step 2, image 2 of 3 iMac Intel 27" EMC 2639 RAM Replacement, Remove the RAM door: step 2, image 3 of 3
    • Pull the RAM access door off the back of the iMac.

  3. iMac Intel 27" EMC 2639 RAM Replacement, Unlock the RAM tray: step 3, image 1 of 3 iMac Intel 27" EMC 2639 RAM Replacement, Unlock the RAM tray: step 3, image 2 of 3 iMac Intel 27" EMC 2639 RAM Replacement, Unlock the RAM tray: step 3, image 3 of 3
    • The RAM tray is locked into its upright position with two grey tabs.

    • Use your thumbs or index fingers to unlock the tray by pushing the tabs outward, away from the RAM.

    • Pull the tabs out and down, swinging the RAM tray down to a near-horizontal position.

  4. iMac Intel 27" EMC 2639 RAM Replacement, Remove the RAM: step 4, image 1 of 3 iMac Intel 27" EMC 2639 RAM Replacement, Remove the RAM: step 4, image 2 of 3 iMac Intel 27" EMC 2639 RAM Replacement, Remove the RAM: step 4, image 3 of 3
    • Remove a stick of RAM by grabbing it with two hands and pulling straight out of the RAM tray.

    • RAM modules are keyed so that they can only be installed in the proper orientation. Note where the shorter section of contacts is when removing, and reinstalling, your RAM.

    • To install a new module, insert the module into the desired slot in the tray and press it firmly in place. Push the tray back up until it locks in place.

    • The RAM access door is not symmetrical. If it is not flush on both ends, try putting it in the other way.

    • Re-insert the RAM access door back into its place.

Conclusion

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

Take your e-waste to an R2 or e-Stewards certified recycler.

Repair didn’t go as planned? Try some basic troubleshooting, or ask our Answers community for help.

68 other people completed this guide.

14 Comments

I just purchased RAM and this guide was very accurate. Thank you.

Nicole Hamilton - Reply

Hi guys! I have to slot full with the basic amount of RAM (2 x 4 GB), can I install 2 x 8 GB in the other two slots available? I want to upgrade to 24 GB of RAM, but I don't know if there are any problem putting together 4 GB modules with 8 GB ones. I remember an old story about possible issues... Thanks for your replies! :-)

Franz - Reply

You should be fine with pairs of equal capacity. 2 X 4 GB and 2 X 8 GB

Usually best to install in pairs of similar sizes

P

mrmacfixit -

I just upgraded mine from 16GB to 32GB. The only problem with this guide is that it says the difficulty is moderate. What could be easier? It took me less than five minutes, and most of that was unplugging/replugging stuff before and after the actual RAM upgrade.

I used a screwdriver to push on the little button that opens the door, as I didn't have a spudger handy.

Jake Robb - Reply

Great job, thanks

ventosa09 - Reply

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