Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

Level 1

80 points

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

Best reply

Robbbbbbbbiiiiiiieeeeee

Level 1

70 points

Posted on Mar 16, 2022 9:55 AM

Like you, I only got the lower refresh rates using the Thunderbolt to DisplayPort cable between Mac mini and LG monitor.

So I used an HDMI cable to HDMI cable and get the same refresh rate and resolution I got with the DisplayPort , but it's not as sharp.

It IS a reasonably good HDMI cable. Maybe that makes a difference?

Hopefully Apple will address this.

Best of luck.

View in context

Similar questions

24 replies

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

80 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.

Mar 31, 2022 11:08 AM in response to macraider

Apple apparently just pushed a fix…

https://www.macrumors.com/2022/03/31/apple-releases-macos-monterey-12-3-1-with-bluetooth-and-display-fixes/

macraider Author

Level 1

80 points

Apr 1, 2022 2:40 AM in response to macraider

Updating to macOS 12.3.1 fixed the problem. Same on the new Mac Studio.

Mac mini showing black screen at login after macOS 12.3 update