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Mac mini showing black screen at login after macOS 12.3 update

Hello everyone. I updated my Mac mini 2018 with the last update of macOS Monterey. I see the Apple logo but the login screen is no more visible. I tried the followings:

Safe Reboot: everything's fine, until I reboot normally.

NVRAM Reset: nothing changed.

Recovery Boot with Disk repair: no errors.

Formatted the whole Macintosh HD then installing Monterey 12.3 pendrive and restoring a 5 days ago backup: same black screen at login.

During the installation I noticed my monitor was having strange colors at restart/reboot. All gray, all green and of course all black at last. After 8 hours I have to give up.

PS. My Mac mini is visible on a network. I tried to control the screen, but shows black on Remote Desktop.

Anyone having the same? Ideas? Thank you for reading.

Posted on Mar 15, 2022 3:23 PM

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vovnit

Level 1

13 points

Posted on Mar 16, 2022 12:13 AM

Load from Safe mode and change resolution to one without scaling.

I had to clean reinstall MacOS to figure this out. With native monitor resolution everything is working fine, but once scaling resolution is turned on, everything goes dark. I hope it's going to be fixed real soon.

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24 replies

t33j4y

Level 1

4 points

Mar 31, 2022 1:37 AM in response to macraider

I found a mail from the forum admins stating that my post had been removed as I referenced a beta release. Kind of an overreaction since I didn't divulge anything. I don't even use or have access to betas as far as I know. But nvm.

macraider Author

Level 1

88 points

Mar 31, 2022 4:07 AM in response to Stingray1978

Stingray1978 wrote:

I use two 4K MAG321CURV from MSI. One connected via HDMI 4K 60 Hz, scaled to 2K and the other the same via USB-C to Displayport. No problems so far.

My LG with Mac Studio shows black with more than 30 Hz with Thunderbolt to Thunderbolt cable and HDMI to HDMI. Thanks anyway, don't want to OT

Apr 1, 2022 6:13 AM in response to Stingray1978

Many thanks for the heads up Stingray1978. I updated, swapped my 4k monitor back to USB-C > Displayport, and swapped my secondary monitor back to the HDMI slot on my Mac mini (2018) and....

... the secondary monitor refused to display anything.

A certain waste of time fiddling and a reboot sorted it though.

All has been well so far today.

macraider Author

Level 1

88 points

Mar 16, 2022 1:42 AM in response to vovnit

I did, you're right. It shows no other resolution than 1920 x 1080, when I try to make it bigger, shows black. Thanks for your feedback, I thought was broken.

vovnit

Level 1

13 points

Mar 16, 2022 4:34 AM in response to macraider

I'm using Thunderbolt 3 to DisplayPort adapter and it's not working with different resolutions now. I'm sure they'll figure it out in the next update

Mar 16, 2022 2:24 PM in response to Robbbbbbbbiiiiiiieeeeee

Did anyone manage to get 2 screens working ? I have two 4K from MSI. I can get them to work over HDMI or USB-C with the native 4K 60Hz (no scaling) but only one at a time!

Mar 17, 2022 2:21 AM in response to Stingray1978

Ah, very interesting. It's just occurred to me that when I plugged my 4k monitor into my second Mac, that made it three monitors plugged into it....

The hoops we have to go through.

Mar 30, 2022 11:17 PM in response to Stingray1978

I recently got a new Mac Studio... It worked with my two screens right out of the box- whereas my Mac Mini didn't. So this is also somehow related to the graphics card or Intel...

Mar 31, 2022 1:38 AM in response to macraider

I use two 4K MAG321CURV from MSI. One connected via HDMI 4K 60 Hz, scaled to 2K and the other the same via USB-C to Displayport. No problems so far.

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Mac mini showing black screen at login after macOS 12.3 update