Rare crash/restart when sleeping on Intel Retina iMac

[MR_Boogy]

I've a 2020 27" Retina 5k iMac, I think the last of the pre-M1 models. Running OS 12.2.1 - I used the utility tool to transfer stuff from my old Mac Mini 2012. The iMac was originally running Cataline out of the box.

I sleep my Mac overnight and rarely - maybe monthly - I'll come to my mac in the morning to find a "your system restarted" popup and a "send crash dump to Apple?" dialog.
I used to see this more and more frequently on my old Mini which is the main reason I upgraded - I use it for my work and I was worried it was going to fail. So it's a bit worrying that a brand new Mac is exhibiting the same thing.

A bit of Googling throws up the obvious answer "don't sleep" but that's not really a fix. If using the indicators on my car caused the engine to sometimes cut-out I might avoid using them but only until I could get it to the garage
Is it possible that in migrating from my old Mini (which has been through a lot of OS version upgrades) something could be copied which is causing a problem? Do we even know the fundamental cause of this problem which seems to have been reported for quite some time? A spontaneous reboot of a computer when you're not even using it is a pretty severe event, even Windows doesn't do that these days (though many remember the BSOD which used to happen regularly!)

 

[zarmanto]

Well, my personal experience isn't going to be of much use in this conversation, because... ummm... I don't sleep any of my Macs, and as such, I've obviously never observed the issue you're describing. 🤷‍♂️

That said: have you taken a look at the system logs of the computer, after a reboot event? That could potentially help you track down the source.

 

[pshufd]

I have had a few of these but not recently. 12.2.1 is pretty old and I find 12.5 to be a lot more stable than the early Monterey releases. So you could start by upgrading to the latest version of Monterey.

If I see strange stuff happening on a Mac, I try to find the cause. If I can't after a while, I reformat and do a clean macOS installation and start fresh. This approach has minimized my problems with macOS over the years. Sometimes it is just a bug and then you can't do much about it short of running a version of the operating system that predates the problem.