Mac Mini won't wake up after 12.3 update

My Mac Mini (2018) with LG HDR WQHD Display connected via USB-C. (I don't think the display has anything to do with this problem though.)

Everything was working fine, but after the update to 12.3 neither the keyboard, or wireless mouse (via BT/USB) or even a wired mouse will wake it up. Just a dark screen.

I have to push the button to shut it down and then restart. Very annoying. Once it restarts everything is fine. But when I leave the machine and let it "sleep" as set in Preferences => Energy Saver => Power => "Turn the display off after:" settings, then there is nothing I can do to wake it up other than restart.

Is there any way to fix this? I suppose I could set it to Never turn the display off, but I don't want that. Thanks.

Mac mini 2018 or later

Posted on Mar 15, 2022 3:49 PM

Top-ranking reply

jeffreythefrog

Level 6

14,250 points

Posted on Mar 15, 2022 4:10 PM

i would try going into System Preferences > Energy Saver and put a checkmark in "Prevent your Mac from automatically sleeping when the display is off" and remove the checkmark from "Put hard disks to sleep when possible" and see if that corrects the behaviour.

but even if that works, it may just be a "band-aid". i'm thinking you may want to download and run the free version of EtreCheck so we can see if you have some conflicting software installed that is causing your issue. make sure you give "full disk access" to etrecheck. read how to use it by reading Using EtreCheck. if you need help interpreting the report, you can see how to post the report here by reading How to use the Add Text Feature When Posting Large Amounts of Text, i.e. an Etrecheck Report. and it automatically obscures sensitive things (like serial numbers) so you don't have to worry about sharing the report here.

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Mac Mini won't wake up after 12.3 update

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