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A1418 / EMC 3069 / 2017 / 3,0 GHz Quad-Core i5, 3,4 GHz Quad-Core i5 oder 3,6 GHz Quad-Core i7 Prozessor. Erscheinungsdatum: 8. Juni 2017.

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Upgrading to 32gb RAM on 3.0GhZ Model


I'm tossing up between a 3GHz and a 3.4Ghz model of the 2017, 4k iMac. (EMC 3069 / A1418).

Despite what apple suggest - I have read on the iFixIt blog that the 3GhZ model is capable of "unofficially" supporting 32GB ram. (HERE)

However, i've come across a few other sites that suggest this is purely speculative (HERE)

Has anybody had first hand experience upgrading the 3.0GHz model to utilise 32GB of RAM?


Beantwortet! View the answer Ich habe das gleiche Problem

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Gewählte Lösung

Apple offers four 21.5” A1418 systems! Three of which have 4K display and one that carries over the older display.

So lets look at the low end model: iMac 21.5" 2.3 GHz i5 (Mid-2017) Here we can see the max this system can support is 16 GB.

Now lets look at the next one up which has a 4K display: iMac 21.5" 3.0 GHz i5, 4K, (Mid-2017). And the next one: iMac 21.5" 3.4 GHz i5, 4K (Mid-2017) Both of which support 32 GB of RAM.

So why is this the case? It turns out the low end is using the same logic board of the older Late 2015 models with just an upgraded CPU which is why its RAM is limited. The newer 4K models have a very different logic board as these model use a newer CPU socket and PCH logic which is why these support the higher RAM!

Now if you are planing on upgrading the RAM on your own. Be very careful taking the display off as you can damage it quite easily it you don’t use the proper tools and techniques as outlined in the IFIXIT guides.

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Cheers Dan - You're a legend! I'm a bit too jittery with my hands, so i'll probably take it to a pro to do the upgrade :)


@jjww - Thanks! Don't forget the score and accept the answer - Enjoy!


Just completed the 32 gb RAM upgrade thank you for the digital assist. Your tool kit was priceless and the tips on getting the display off where critical. No real issues after that. It was fun taking apart the entire system and getting an inside. look at it. I did lose a screw that holds the hard drive mount in place so that slowed me down a bit. It had lodged itself under the mother board... so it took me a while to back track and find it. The tricky bits where: 1) replacing the hard drive SATA cable 2) replacing the power board cable. 3) replacing the lower support bracket (chin strap).


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Success!!! Followed guide on iFixit, system booted and allowed clean install of Mojave on SSD, installed while open.

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Josh wird auf ewig dankbar sein.
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