Model A1418 / Late 2013 / 2.7 & 2.9 GHz Core i5 or 3.1 GHz Core i7 Processor

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SSD & Memory Upgrade info

My iMac EMC2638 2.7Ghz 21.5" has a standard HDD fitted and I want to replace3 it with a 2.5" SSD drive, is this just a case of swapping over or does it need anything to stop fan speeding up as not getting temp?

And what is the maximum amount of RAM my machine can have fitted?

Many thanks for help.

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Here is the specs for your system: iMac 21.5" 2.7 GHz i5 (Late 2013)


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To start with this system is not easy to open and getting to the RAM is a bear! You can easily damage the display if you don't use the correct tools and techniques outlined in the IFIXIT guides. Here is the guide to replace the HD: iMac Intel 21.5" EMC 2638 Hard Drive Replacement and here is the guide for getting to the RAM: iMac Intel 21.5" EMC 2638 RAM Replacement.

You can use any 2.5" SATA SSD in place of your HD. But if you are going down to the RAM, why don't you look for a PCIe blade SSD designed for your system and install it. It will give you much better performance than the HD swap out. As for the thermal sensor this 21.5" models don't use one as the 2.5" laptop drives Apple uses run cooler than the larger 3.5" drives.

The last option here is look at a Thunderbolt2 external RAID drive system which will give you better performance than the HD's SATA III (6.0 Gb/s) interface. Here's one option: ThunderBay 4 mini. This is the direction we went as it was more cost effective.

The max memory this system supports is 16 GB. Just remember the RAM is on the back side of the logic board.

iMac Intel 21.5" EMC 2638 Hard Drive Image


iMac Intel 21.5" EMC 2638 Hard Drive Replacement



1 - 2 hours

iMac Intel 21.5" EMC 2638 RAM Image


iMac Intel 21.5" EMC 2638 RAM Replacement



45 minutes - 1 hour

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