Mac mini M1 chip doesn't fully shut down - Kernel panic

[Superschulzen]

Hi all - new to the forum.

I received the Mac mini M1 chip about 2 weeks ago. Ever since day one, when the Mac mini is on for longer periods, it doesn't shut down completely. When I shut it down, the connection to my two monitors will go off (no signal displayed on both), but the "power" light stays on - sometimes for hours. I never had this issue with my previous Mac mini (2014), and can't figure out what the issue is. I have one monitor connected via the HDMI port, and the other one via the HDMI port of an Anker USB C hub.

I contacted Apple support, we tried a couple things, including doing a re-install of Mac OS 11.1 and a hardware check which found no issues.

In order to get the computer back to life, I need to do push the "ON" button and it will reboot, and come up with a "Kernel panic" message. I post the message below - would anyone happen to know what causes the issue from that message?

panic(cpu 5 caller 0xfffffe0010df9068):  initproc exited -- exit reason namespace 2 subcode 0x5 description: none
Debugger message: panic
Memory ID: 0x6
OS release type: User
OS version: 20C69
Kernel version: Darwin Kernel Version 20.2.0: Wed Dec  2 20:40:21 PST 2020; root:xnu-7195.60.75~1/RELEASE_ARM64_T8101
Fileset Kernelcache UUID: 3E6AA74DF723BCB886499A5AAB34FA34
Kernel UUID: 48F71DB3-6C91-3E62-9576-3A1DCEF2B536
iBoot version: iBoot-6723.61.3
secure boot?: YES
Paniclog version: 13
KernelCache slide: 0x0000000008a04000
KernelCache base:  0xfffffe000fa08000
Kernel slide:      0x0000000009544000
Kernel text base:  0xfffffe0010548000
Kernel text exec base:  0xfffffe0010610000
mach_absolute_time: 0x45d276cebd
Epoch Time:        sec       usec
  Boot    : 0x5fe7b0af 0x000ae116
  Sleep   : 0x00000000 0x00000000
  Wake    : 0x00000000 0x00000000
  Calendar: 0x5fe7e177 0x0009e798

CORE 0 recently retired instr at 0xfffffe001077ac5c
CORE 1 recently retired instr at 0xfffffe001077ac5c
CORE 2 recently retired instr at 0xfffffe001077ac5c
CORE 3 recently retired instr at 0xfffffe001077ac5c
CORE 4 recently retired instr at 0xfffffe001077ac60
CORE 5 recently retired instr at 0xfffffe0010779798
CORE 6 recently retired instr at 0xfffffe001077ac60
CORE 7 recently retired instr at 0xfffffe001077ac60
Panicked task 0xfffffe166d3dcc70: 1680 pages, 13 threads: pid 1: launchd
Panicked thread: 0xfffffe166d58c658, backtrace: 0xfffffe3089f5b530, tid: 93946
          lr: 0xfffffe001065df8c  fp: 0xfffffe3089f5b5a0
          lr: 0xfffffe001065dd58  fp: 0xfffffe3089f5b610
          lr: 0xfffffe001077ff5c  fp: 0xfffffe3089f5b630
          lr: 0xfffffe0010771914  fp: 0xfffffe3089f5b6e0
          lr: 0xfffffe00106177e8  fp: 0xfffffe3089f5b6f0
          lr: 0xfffffe001065d9e8  fp: 0xfffffe3089f5ba80
          lr: 0xfffffe001065d9e8  fp: 0xfffffe3089f5baf0
          lr: 0xfffffe0010df843c  fp: 0xfffffe3089f5bb10
          lr: 0xfffffe0010df9068  fp: 0xfffffe3089f5bb80
          lr: 0xfffffe0010b47348  fp: 0xfffffe3089f5bc10
          lr: 0xfffffe0010b46ca4  fp: 0xfffffe3089f5bca0
          lr: 0xfffffe0010b63b24  fp: 0xfffffe3089f5bd10
          lr: 0xfffffe0010b640c0  fp: 0xfffffe3089f5bd60
          lr: 0xfffffe0010657628  fp: 0xfffffe3089f5bd90
          lr: 0xfffffe0010617d78  fp: 0xfffffe3089f5bda0
          lr: 0xfffffe00107712f4  fp: 0xfffffe3089f5bdc0
          lr: 0xfffffe001065f4a0  fp: 0xfffffe3089f5be20
          lr: 0xfffffe00107739f8  fp: 0xfffffe3089f5be40
          lr: 0xfffffe0010771ce4  fp: 0xfffffe3089f5bef0
          lr: 0xfffffe00106177e8  fp: 0xfffffe3089f5bf00

last started kext at 74554158540: com.apple.driver.AppleXsanScheme    3 (addr 0xfffffe0010044000, size 16384)
last stopped kext at 4829103989: com.apple.driver.usb.AppleUSBHostPacketFilter    1.0 (addr 0xfffffe00103b4000, size 16384)
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** Stackshot Succeeded ** Bytes Traced 44147 (Uncompressed 155984) **

Thanks for your help

 

[Superschulzen]

UPDATE:
The issue continued to occur, even after I did a clean install - turns out it's an issue with the second monitor as well...I thought I had fixed the issue when the shutdown worked fine after the fresh clean install of BigSur, but then it stopped again - the only difference was that I had attached a second monitor again, which I had unplugged during the new install. After removing it, it worked again. I then tested it with my wife's new Dell 24" monitors (identical) - same issue. One monitor (via HDMI) fine, second one causes shutdown issue when connected via USB C to HDMI. Very odd.

 

[chaindev]

I have the exact the same issue. It seems related to my configuration (eGPU with extra monitor). It occurs when I installed Big Sur.

 

[Superschulzen]

I have the exact the same issue. It seems related to my configuration (eGPU with extra monitor). It occurs when I installed Big Sur.

It definitely seems to have to do with certain external(s).... My Mac was already more than 15 calendar days "old", so turns out you can't return it (which I had considered as the problem as ongoing). My only option was to have it serviced - luckily, my local Apple Store apparently is considered essential service (for repairs only, not for sales), so I dropped it off on Dec 31 and got it back today. they ran all kinds of checks, even had it running since the 31st until today, and couldn't reproduce any kernel panic (I sent them my report via email). Seems it must be one of my externals which I am trying now - so far, two shutdowns worked fine with no issues, so will continue to monitor the situation and update here.

EDIT: I forgot to mention that the Apple tech did re-install the firmware, but as mentioned below, the issue still exists.

 

[chabig]

Off topic a little bit, but nobody has said it so far. Don't shut down your Mac.

 

[Superschulzen]

Off topic a little bit, but nobody has said it so far. Don't shut down your Mac.

Why not? I was under the impression that rebooting it here or there helps its performance? No?

 

[chabig]

There really is no reason at all to shut down the Mac. It has no affect on power-on performance and in fact actually performs worse when it's shut down, as it does nothing at all!

Should You Shut Down Your Mac or Let It Sleep Every Night?

One question that new Mac users often ask is whether they should shut down their Macs at the end of the day or just let them sleep. The quick answer is...

eshop.macsales.com

It doesn't harm the computer to shut it down, of course. It's just not necessary or beneficial in any way, probably especially so with the M1 machines as they use almost no power at all when asleep.

 

[Fishrrman]

I not only "shut down" my Mini each night, I disconnect it from "the mains" as well.

All my computer equipment (Mini, drives, ethernet switch, display, etc.) is plugged into a surge protector beneath the desk. When I'm done for the night, I shut down the Mini, let it go dark, and then reach down and switch off the surge protector.

In the morning, I switch on the surge protector, and then power up the Mini.

I've done this with my Macs (and Apple //c before that) since 1986.
I'm not going to be changin' my ways now.

And... this routine has ALWAYS worked beautifully for me.
My Macs almost NEVER have the slightest speck of trouble...

 

[chabig]

I've done this with my Macs (and Apple //c before that) since 1986. I'm not going to be changin' my ways now.

I have a lot of respect for you and your troubleshooting contributions to the forums, but this says more about you than anything else. Technology has advanced since 1986 and best practices have changed with it. I’m a little bit surprised you don’t disconnect your whole house from the power grid at night too. 😉

 

[August West]

They changed the SIL (Sleep Indicator Light) behavior on the 2018 and newer Mini's. It no longer pulses when sleeping.

SIL Behavior

During sleep​

When your Mac sleeps, the SIL pulsates on and off slowly. On Mac mini models from 2018, the SIL stays on when the computer is in sleep. You can customize your Mac's sleep behavior in the Energy Saver pane of System Preferences.

 

[seadragon]

Regardless, the Mac should be able to shutdown properly. That is the issue here.

 

[Superschulzen]

Still trying to narrow it down. Kernel panic happened again this morning. Other than my monitor (LG ultra wide 34"), the wired Apple keyboard (through USB at back) and the Magic Mouse (Bluetooth), the only external connected at the time was a Logitech webcam (through the other USB port at the back). I now switched it with my wife's webcam to see whether that is it, and switched the HDMI cable (once again). As an aside - I have tried multiple monitor configurations before:

• single Dell 24" monitor via HDMI (worked)
• two Dell 24" monitors via HDMI and USB C to HDMI (kernel panic)
• BenQ 23"

 

[Superschulzen]

They changed the SIL (Sleep Indicator Light) behavior on the 2018 and newer Mini's. It no longer pulses when sleeping.

SIL Behavior

I am aware - however, there are no issues during sleep, only when shutting the Mac down

 

[Fishrrman]

I suggest DISCONNECTING any USB webcam (for experimental purposes only).
Boot and shut down a couple of times.
Does anything change?

 

[Superschulzen]

I suggest DISCONNECTING any USB webcam (for experimental purposes only).
Boot and shut down a couple of times.
Does anything change?

Thanks for the recommendation - I am testing it. So far it worked when I only let the Mac run briefly before shutting it down again, but will see what happens when computer is on for longer period of time. Thanks!

 

[Superschulzen]

I suggest DISCONNECTING any USB webcam (for experimental purposes only).
Boot and shut down a couple of times.
Does anything change?

So I tried it, but the issue still persists even when no webcam was plugged in. However - I do have a new suspicion. I do back-ups to a 2TB Apple Time Capsule via WiFi and also to a 1TB Samsung T7 SSD - I noticed when shutting the Mac down today that the Time Machine back-up was still running, but I had already initiated the shut down process at that time. I wonder if there may be an issue with doing back-ups to my Time Capsule? Would you or anyone else have thoughts on this? I googled it, and there were issues exactly as I experience with Catalina, so this seems like a possible cause.

OS Catalina on my iMac & shut down - Apple Community

discussions.apple.com

Catalina shutdown problems - Apple Community

discussions.apple.com

I will keep monitoring this (turned off back-ups for the next few days to test it), but thought I'd ask here too.

 

[pldelisle]

I have a lot of respect for you and your troubleshooting contributions to the forums, but this says more about you than anything else. Technology has advanced since 1986 and best practices have changed with it. I’m a little bit surprised you don’t disconnect your whole house from the power grid at night too. 😉

I don’t see any cons in what he said. Disconnecting completely from power is totally fine and has nothing to see with “evolution of technology”. It’s safer to do it in fact: if a thunderstorm occurs or power failure, it will be protected of any surge/power fluctuations.

 

[Superschulzen]

UPDATE - solution found.
I can now confirm that my issue was caused by my wireless TimeCapsule back-up. I turned back-ups to TimeCapsule off, and did not have a single shut down issue since, after multiple periods of >2h up to 10h of work/use, and then testing the shutdown. No issues. It may have to do with the hourly back-ups - maybe the drive can't properly be ejected? Not sure. I was able to have repeated back-ups to my external SSD, and it didn't matter if it was connected directly to the Thunderbolt/USB C port on the Mac itself or via my Anker USB C hub during the last 3 days, with 0 issues or kernel panics. This morning, I re-connected the TimeCapsule, back-up runs, and voila, when I shut down the Mac mini after about 2.5h runtime, the light stays on and the kernel panic message pops up again. I will stop using TimeCapsule for this Mac now, and only back up to my external SSD> thanks everyone for your input.

 

[F23]

UPDATE - solution found.
I can now confirm that the issue was caused by my wireless TimeCapsule back-up. I turned back-ups to TimeCapsule off, and did not have a single shut down issue since, after multiple periods of >2h up to 10h of work/use, and then testing the shutdown. No issues. It may have to do with the hourly back-ups - maybe the drive can't properly be ejected? Not sure. I was able to have repeated back-ups to my external SSD, and it didn't matter if it was connected directly to the Thunderbolt/USB C port on the Mac itself or via my Anker USB C hub during the last 3 days, with 0 issues or kernel panics. This morning, I re-connected the TimeCapsule, back-up runs, and voila, when I shut down the Mac mini after about 2.5h runtime, the light stays on and the kernel panic message pops up again. I will stop using TimeCapsule for this Mac now, and only back up to my external SSD> thanks everyone for your input.

I don't and never have used Time Machine. I get kernel panics every day. I only have 2 monitors attached. Nothing else.

 

[Superschulzen]

I don't and never have used Time Machine. I get kernel panics every day. I only have 2 monitors attached. Nothing else.

Sorry to hear. This is what solved it for me it seems.

 

[F23]

Sorry to hear. This is what solved it for me it seems.

😔😞

 

[Skorpion24]

I have the same issue, new Mac Mini M1 owner since yesterday, the mac won't shut down properly, it takes me to the login page, I log in and I get the error message that the mac wasn't shut down properly. I have connected only my 34" ultrawide monitor, external speakers via 3.4mm jack. Mouse and Keyboard are via bluetooth.

 

[Superschulzen]

I have the same issue, new Mac Mini M1 owner since yesterday, the mac won't shut down properly, it takes me to the login page, I log in and I get the error message that the mac wasn't shut down properly. I have connected only my 34" ultrawide monitor, external speakers via 3.4mm jack. Mouse and Keyboard are via bluetooth.

Sorry to hear. A couple of thoughts:

• Have you tried a different cable for your monitor (HDMI to HDMI) - I initially had an issue with the USB-C to HDMI cable I had bought.
• Otherwise, Apple recommended to trial each individual external device.
• Or, as in my issue, if you use TimeMachine for backups, maybe turn back-ups off for a few days to see whether that makes a difference.
• Lastly - make sure all your software is up-to-date - maybe an older piece of software is incompatible with the M chip.

I hope you get this sorted soon. My Mac hasn't had any issues since 10 days now (since I stopped back-ups to my TimeCapsule), despite 5 or 6 externals plugged in.

 

[Skorpion24]

I resolved the problem by uninstall Karabiner Elements, that was causing the restarts and the kernel panic.

 

[Marx55]

If the Desktop Mac is disconnected from the mains (mainly for long periods), it drains its internal battery.