late 2013 27inch iMac, how much RAM does it support

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late 2013 27inch iMac, how much RAM does it support

I have a 27-inch late 2013 iMac. I'm wondering how much RAM it can support. I've previously been told it is maxed out at 16GB but I look online and i see reference to some with 32GB. How can I know if the RAM is maxed out or not?

iMac, macOS High Sierra (10.13.4)

Posted on May 19, 2018 5:53 PM

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Answer 1

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macjack

Level 10

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May 19, 2018 5:58 PM in response to MRJHONGKONG

Yes, you can safely install 32GB. Apple publishes it specs on introduction and Apple RAM (16 GB) but then third parties manufacture RAM that can support 34 GB.

But Macs are fussy about RAM, so only use high quality RAM. Both Crucial and OWC are reliable vendors with high quality RAM.

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Answer 2

Niel

Community+ 2026

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743,399 points

May 19, 2018 5:56 PM in response to MRJHONGKONG

1. 32GB.

2. Choose About This Mac from the Apple menu and see how much is installed.

(160676)

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Answer 3

MRJHONGKONG Author

Level 1

8 points

May 19, 2018 5:58 PM in response to Niel

Hi there, thanks for the reply. Yes I can see how much is installed easily, but how much expansion does this device support? (i.e. can I install more RAM to take it up 32Gb)

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