ChrisRJun 15
My #Apple 16" M1 #MacBookPro has just rebooted itself... again. It was fully charged; I closed the lid and left it for a few minutes to get a cup of tea. When I came back it re-booted. It's happened a few times recently. Running Sonoma 14.8.5. Anyone have any ideas what could be happening? Running #BitDefender which seems happy...
Show threadDeixis9

@carusb Mine has been doing that since the guarantee ran out circa 2021; if it isn't touched for a few minutes it reboots. This began at the same time the touch bar began strobing.

Still going though. Updates seem to affect the M1, untested I guess

There's a thread on the Mac forum.

Let me know if there's ever a class lawsuit.

#M1MacBook

Jun 15 at 6:13pmWeb
Show threadChrisRJun 16

@Deixis9 @Thebratdragon
@Theriac
@kaiser_franz
@serichards Happened again this morning. Done a full BitDefender scan, all fine. Did a restart and ran Apple Diagnostics, all fine. Still on 14.8.5, so auto-update's not on. Spotted a couple of apps that had updated themselves more recently, decided I didn't need them (BBEdit??), gone

A possible common link is using the laptop sitting up in bed in the morning, so it's resting on the duvet, then closed and laid on the duvet. So, temperature? 1/2

Show threadChrisRJun 16

@Deixis9 @Thebratdragon @Theriac @kaiser_franz @serichards I thought there was a temperature measure in Activity Monitor, but it's Energy. Highest usage by far last 12 hours was Dropbox. Had a close look & found some files in a folder for my sister that had little clouds against them. I suspect it's been struggling to sync them for ~10 years! Deleted them, and Dropbox Energy usage has dropped through the floor.

Used my rocket blower on the vents (?), wondered if I should try vacuuming them? 2/2

Show threadSuzy RichardsJun 16
@carusb @Deixis9 @Thebratdragon @Theriac @kaiser_franz Definitely worth a hoover.
Show threadEstarriol, Terrorist DragonJun 16

@carusb @Deixis9 @Theriac @kaiser_franz @serichards

get a sheet of chipboard or similar, the size of the laptop and rest iy on that, see if hat helps.

Show threadChrisRJun 17
@Thebratdragon Currently sitting on a book, which ISTR is what I used to do (my old 2014 MBP had vents underneath, I think, while this one is solid metal, which is maybe why I relaxed that precaution!).
Show threadEstarriol, Terrorist DragonJun 17

@carusb

being solid metal might be part of its heat dissipation method.

Can you leave it running up on 2 runners so most of the base has airflow and see if it plays up then?

Show threadKaiser   📷 🎞️ 💿 Jun 16

@carusb @Deixis9 @Thebratdragon @Theriac @serichards

A few more things you can try based on my limited research:

In a terminal run:

log show --predicate 'eventMessage contains "Previous shutdown cause"' --last 30d

Apparently a code of -3 means thermal shutdown

You can also run:

ls /Library/Logs/DiagnosticReports/

If any files it returns are .panic then it was a hard crash and you can view those files to maybe get some more info?