On Nov 19, 2020, at 8:31 PM, Macs R We <[email protected]> wrote: OK, I thought you were saying it only rebooted when you weren't there to watch it.
Mostly, yes, but twice while I was there When I encountered this behavior recently, I found there was corruption in the APFS snapshots. Unfortunately, I found this only *after* the machine committed total hara-kiri, because Disk Utility was entirely too incompetent to detect any problem at all, and DiskWarrior still can't handle APFS. The problem was entirely undetectable until macOS finally diagnosed it by refusing to boot at all.. and by that time it was impossible for macOS to correct. An early symptom of the problem was that Time Machine backups had (silently) stopped running — they'd launch, spend a lot of time "preparing," then stop with no message. Heroic attempts to diagnose/correct that problem also failed completely, but subsequent experience indicates it was another effect of the same corruption. My advice is for you to keep an actual clone copy up to date (on a non-APFS drive) so you'll have something to recover from on the day macOS finally wakes up and realizes, "Looka that, I'm dead!" This is good advice, thank you! On Nov 19, 2020, at 5:50 PM, Jeff Weinberger <[email protected]> wrote: On Thu, Nov 19, 2020 at 7:18 PM Macs R We <[email protected]> wrote: > Do you have automatic updating enabled? If the system performs an > automatic update that requires a reboot, it will reboot. > I have automatic updates enabled for things other than system updates, so there should never be a reboot and there never was one in any previous version before Big Sur. Also the time it rebooted while I was working was very sudden - it didn't shut down in an orderly fashion. It just instantly went black and then the apple logo appeared. > > > On Nov 19, 2020, at 11:03 AM, Jeff Weinberger <[email protected]> > wrote: > > > > I upgraded my iMac (21.5 inch, Late 2015) to Big Sur (11.0.1). Since > then it's been restarting every now and then. I've noticed it tends to > happen when I've been away from it for a while (like overnight, or if I go > out for a few hours), but it's also happened once while I was working. It's > probably happened 4-5 times since I upgraded 3 days ago. > > > > Is this a known bug? Has anyone seen this? > > _______________________________________________ > > MacOSX-talk mailing list > > [email protected] > > https://www.omnigroup.com/mailman/listinfo/macosx-talk > > _______________________________________________ > MacOSX-talk mailing list > [email protected] > https://www.omnigroup.com/mailman/listinfo/macosx-talk > _______________________________________________ MacOSX-talk mailing list [email protected] https://www.omnigroup.com/mailman/listinfo/macosx-talk
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