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Model A1312 / Mid 2011 / 2.7 & 3.1 GHz Core i5 or 3.4 GHz Core i7 Processor, ID iMac12,2

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Any list of compatible PSU?

From what I read, I’d guess that PSU for iMac 27” 2009/2010/2011 were the same. It’s not clear if 24” PSU would be different (I’d it would be stupid from Apple to have different PSU for different iMacs, but…).

Is there any list of PSU compatibility out there? It’s a bit frustrating to wait for exactly you iMac to appear on the “sold as broken” list.

Answer this question I have this problem too

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Yes the 27” iMac PSU, 310W is the same for 2009/10/11 systems. Just like the 21.5” iMac PSU, 205W is the same across the 2009/10/11 systems.

The older 2009 20" PSU, 180W and 24" PSU, 250W are different!

And the 2007/08 systems are yet different again! 2008 20" PSU, 180W & 2007 20" PSU, 180W are each different from each other (wiring difference) yet the 24" PSU, 250W works for both 2007 & 2008.

As for why these are different mostly its Wattage as Intel altered the power requirement for the chips over time.

The newer Thin Series from 2012 onward are also a bit different!

The Late 2012/Early 2013 21.5" PSU 185W is different from Late 2013/14/15 21.5" PSU 185W and the 2017/19 21.5" PSU 185W is different again! In all three cases the mechanicals are different.

The Late 2012 27” PSU, 300W, is different from the 2013/14 & Mid 2015, and the Late 2015/17 is different again and lastly the 2019/20 is also different! Apple kept moving things about mechanically.

Not sure why you want a broken PSU?? The ones I’ve listed above with links are from a good supplier which I use based in the UK. iFixit also sells the 27” 2009/10/11 iMac systems iMac Intel 27" EMC 2309, 2374, 2390 or 2429 Power Supply

iMac Intel 27" EMC 2309, 2374, 2390 or 2429 Power Supply Image


iMac Intel 27" EMC 2309, 2374, 2390 or 2429 Power Supply


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I don't want a broken PSU :) I am looking for a cheap, defective iMac that would have a working PSU. PSU + shipping costs + taxes (if from UK or US) is too much for fixing this machine (what's more I am not even sure it's the PSU).


@tcoulon - OK, I get it! Getting a broken system is also risky! It could have a bad power supply too!

Where are you located that getting parts is so difficult?

The only other option is finding your way to an independent Mac repair shop who can fix your system.


I am in Switzerland. I guess a system with a broken screen is likely to have a working PSU.


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Thierry de Coulon will be eternally grateful.
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