"you shut down your computer because of problem"

This (apparently) recurring bug with MacOs appeared suddenly on my iMac several weeks ago, while running 12.3, and it continued into 12.3.1. Official Apple Help was useless, on all counts.

I tried your suggestion . . .

Opened Console

Cleared Diagnostic Reports and moved to Bin

Emptied Bin

Shut down with power button.

Left for 30 seconds

Rebooted with Power Button.

Reboot and log in worked as normal

. . . and Bob's your uncle.

Thank you.

I found the solution that worked for me at reddit:

Deleting a "Sleep Wake Failure" diag file in \Library\Logs\DiagnosticReports that was closest in time to the start of the problem.

See If your Mac restarted because of a problem - Apple Support

Yes this worked for me. Thank you

Opened Console

Cleared Diagnostic Reports and moved to Bin

Emptied Bin

Shut down with power button.

Left for 30 seconds

Rebooted with Power Button.

Reboot and log in worked as normal

In order to get rid of this message, we will delete a log file using Finder.

1. Open Finder on your Mac. Use Command-Space Bar to open Spotlight, then type Finder.
2. From the menu bar at the top, click on Go, then select Go to Folder.
3. Type “/Library” and hit Return.
4. Find and double-click on the Logs folder to open it.
5. Double-click on DiagnosticReports.
6. Go to the search (magnifying glass, top-right corner of the window) and type “sleep”.
7. From the results, look for a recent file named Sleep Wake Failure…
8. Right-click (Control-click) on the file, then select Move to Trash.
9. Shutdown your Mac (Apple  menu > Shutdown).
10. Wait 30 seconds, then press the power button to turn on your Mac. The message should not appear anymore when you log in.

This WORKED for me ! 9/6/2022

Go to Folder then /Library/Logs'DiagnosticReports and delete Sleep Wake Failure and shutdown_stall_date-time_YOU-MacBook-Pro.shutdownstall

Try space bar & command key, and then type in Console

Then open Console

Clear Diagnostic Reports and move to Trash Bin

Empty Bin

Shut down with power button

Leave for 30 seconds

Restart computer with power button and log in

Hope this helps.

I apologize for not being helpful enough. Spotlight needs to be opened up. Two ways of doing this are to click the Magnifying Glass or to press the Space Bar and Command key at the same time. Then enter “Console” in the Spotlight search engine and then open Console.

Thank you! This procedure worked here.

Opened Console.

Selected Diagnostic Reports

Scrolled through these. There was a Sleep Wake Failure noted on the day the power went out here. Wind storm.

Moved that one Diagnostic Report to the trash.

Emptied the trash.

Shut down.

Start up.

Looks OK. I did go through the other suggested steps, one by one, and can confirm that the message on startup, "Your computer shut down because of a problem" did persist through all of it, including reloading MacOS 12.4.

Just started having the same problem with Monterey 12.3.1

After deleting the "Sleep Wake Failure" diagnosis file I no longer have the problem.

Thank you ShHZh!

I have the same problem: iMac, Monterey. My computer has NOT shut down unexpectedly, yet, I get the message "You shut down your computer because of a problem." I did not. I have done the nvpram thing, restarted in safe mode, restarted in safe mode with all peripherals removed, reinstalled from a timemachine backup, reinstalled over the internet--the message still appears. The message does NOT appear in safe mode startup. I have noticed that my keyboard designation changed from Swedish-pro to Swedish (not sure when that happened.) The Swedish-pro designation is no longer available. Right now, I'm living within because after boot, the computer does everything it should.

I had the same problem and it apparently fixed itself. When I shut down now and hit the start button to restart I make sure I hit the circle squarely in the middle and as long as I hear the Apple sound come on my computer starts up fine without that error message. I have tried it several times now and it works perfectly. I just make sure it is completely shut down before I had the start button to restart and it does fine. I also press the start button firmly and it starts every time. I do think it is some. in Monterey -- I just bought this IMAC and downloaded Monterey and I didn't have the problem until then.

It seems one of the graphic accelerators was not turning on (noticed unusual startup screen behavior). After some days, the startup screen ceased its strange pause/flicker, and the message has disappeared. All seems well. In the past, the fan were working hard, now they are a purring along as normal.

Not helpful at all that doesn’t fix the problem . By the way I reinstalled Mac OS Monterrey and I have the same issue afterwards

This worked for me!

Thanks ShHZh!

Shame on you apple.