Mac Mini 2018 Kernel panic bug_type 210 after Security Update 2020-002

Found a Fix for my specific issue ! (Short History and answer below)

I have had this Panic Message upon Start-Up since last February after installing the Security Update & Safare on my Late 2018 Mac Mini using the original Mojave (which I want to keep for my 32bit programs). Too many hours and days with Apple Techs on the phone trouble shooting, and upgrading to Catalina from Mojave. Upon their request I took my 2018 Mini (w/ 128SSD, 8gb, i3) to the Apple Store 14 days ago and left it for a week. They found nothing wrong, but reinstalled Mojave. Still NO Fix !

My specific problem seems to be related to my older USB Mac Keyboard with a Wireless (USB Receiver type) Mouse. I really liked my old extended keyboard, but after getting a New Bluetooth Keyboard and Bluetooth Mouse ... My problem seems to be solved, so far !!!

Hope this helps one of you ...

I installed Big Sur on an external disk and the updated Firmware (Boot ROM Version: 1554.50.3.0.0 (iBridge: 18.16.12561.0.0,0)) seems to have fixed this when booted in Mojave (the startup chime is now enabled by default).

I can again use Safari and put the Mac mini 2018 running Mojave to sleep without a crash and reboot.

Update: it appears that even when the computer does not sleep, it panics/crashes if I have "put hard drives to sleep" checked.

It seems the new Safari 13.1 triggers those crashes:

Reboot, login, open & close the current Safari 13.1 in 10.14.6. Then put the Mac mini 2018 to sleep. It crashes and reboots after about 2 minutes.

If I don't open Safari, the Mac sleeps OK. Also a cold boot does not issue a crash report then. If I have used Safari and shutdown, then after a cold boot there is a crash report.

I could repeat that many times on many user accounts and also on an external disk.

I disabled "Power Nap" and reset my SMC, and since then I haven't had the kernel panics.

See a very full discussion at https://discussions.apple.com/thread/251226783?answerId=252375172022

I would try resetting SMC again. A trick I saw later, to make sure it actually reset, is to disconnect all Internet access, and then see if the time is wrong when you reboot. If the time is wrong, you reset the SMC. (I can't vouch for that being true.)

what does it say when you go to terminal and type

sudo log show --predicate 'eventMessage contains "Previous shutdown cause"' --last 24h

?

Things I tried that did NOT work:

1) Reinstall Mojave

2) Safe Boot

3) Reset PRAM

4) Around two dozen other tricks

I believe it is the latest two (Mojave security 2020-002 or Catalina 10.15.4, and 10.15.4 Supplemental) firmware updates after the end of March that cause these sleep/shutdown crashes.

So even a clean Mojave install with its older Safari 12.1.2 doesn't help. Some people experience crashes unrelated to Safari but at least in my setup Safari 12.1.2 or 13.1 are the only apps I know that 100% trigger the crash.

I have now switched to Chrome until (?) Apple fixes this. ...but at the moment I accidentally by old habit launched Safari so another crash is coming if I put the Mac mini to sleep or after shutdown&cold boot...

BTW I have noticed that if I have not used Safari in a previous session and do a shutdown&cold boot, the Mac reacts readily to the power button. But if I have used Safari and do a shutdown&cold boot, I then must wait several seconds (maybe 10s) before the power button works. Maybe there is a T2 chip shutdown crash going on then?

They CAN solve it by replacing your motherboard. A poster on one of the discussions about this issue had a green SOLVED on his problem - BECAUSE APPLE REPLACED HIS MOTHERBOARD.

Once you have a fresh T2 chip, avoid updates until the all clear is posted.

I too have so many panics because of this.

This morning I've tried to upgrade the T2 chip via initial part of a Big Sur beta installation on an external drive. Thanks for the tip. At least now I have the chime back and, more importantly, the white Apple at boot :D

I have a Sonnet BB 350W with a Sapphire Pulse RX580, plus a dummy HDMI plug in the HDMI port of the Mini.

I just want to add something I discovered a few months ago.

I can reproduce the freeze/panic 100% of the times by doing this:

• Open Safari
• Open a YouTube tab
• Start the video, then pause it after a seconds or minutes (shouldn't matter)
• Put the Mac on sleep (I usually do via Opt+Cmd+Eject)
• [...]
• Resume the Mac (I usually do by clicking on my Unifying-paired Logi mouse
• Reopen Safari
• Play the video

Effects:

For a few seconds the video plays, then just the sound, then after a few seconds also the mouse pointer stops moving. The system is not responsive anymore.

Workarounds:

• Stop using Safari (which I used to love) in favor of... Firefox for example
• Remember to activate the option to reopen closed tabs in Safari and close Safari before putting the Mac to sleep

Update: I was able to install firmware update and am now sitting with iBridge: 18.16.12561.0.0,0

To do this, I did not need to install to an external volume at all. I simply created a USB boot installer and Command R booted from it at startup.

Not sure if there are any other glitches yet but will let you all know.

Thanks again for all the info above, everybody.

I have installed the new security update 2020-007 Mojave without any crash reports after a restart. The T2 BridgeOS has been changed from version 17.16.16610.0.0 to 18.16.13030.0.0 (compare T2 BridgeOS for Big Sur 11.1 is verion 18.16.13017.5.3)

Two days without a crash report! Finally fixed but unfortunate that this took 9 months without a single statement from Apple and three unanswered emails to Tim Cook.

Hope this might help:

https://discussions.apple.com/thread/251244094

cheers,

L

Also see https://discussions.apple.com/thread/251226783?

And yes, it's a crash on sleep, very common apparently on Mini 8,1

Add it to the “monitor won't wake” bug and the “disconnect Thunderbolt when Bluetooth goes on” bugs