MacBook Pro 16 2019 10.15.4 Kernel Panic / Reboot When Plugged In -- Help!

After I I've updated to the latest release of macOS, I've experienced a weird bug every time I leave my laptop closed (still on) for more than a couple hours and plugged in.


It reboots and states the message/log below.


Not sure what they changed but this did NOT happen before the update.


Things I've tried:

  • SMC Reset
  • PRAM Reset
  • Soft Reset
  • Hard Reset


I still experience this issue everyday.

MacBook Pro 16", macOS 10.15

Posted on Mar 28, 2020 1:48 PM

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Question marked as Top-ranking reply

Posted on Apr 9, 2020 9:17 AM

Thank you all for the support and suggestions/work arounds.


For my MacBook Pro, turning off the Power Nap feature on ONLY the Power Adapter setting has worked for me so far. I can leave that feature on when using the Battery.



As a side note, the latest supplemental update for 10.15.4 does NOT fix this issue yet. I have tried the BETA and can confirm they are working on fixing this bug because I did not experience a kernel panic when using it.


Now that said, I do NOT recommend the beta version. When we use betas, we run into beta bugs. There are quite a few that would annoy anyone using it which is why I've reverted back to 10.15.4.


So here's to hoping Apple can push 10.15.5 soon without any new bugs. <----- I know that's probably impossible but here's to hoping right?!

325 replies

May 19, 2020 10:56 PM in response to jcC0le

I was so desperate that I installed the 10.15.5 public beta 3 meanwhile but this does not solve the problem for me.


I do not think that this is a hardware issue. As so many of us are suffering by this bug I do not understand why they are not fixing this with a top priority.


Is any of the developers here who has experience with beta 4 or beta 5 regarding this issue? I would really appreciate feedback.

May 21, 2020 6:56 AM in response to iTimC21

It's somewhat helpful to know I'm not alone. It's massively frustrating that Apple doesn't seem to care. I too called and the rep basically said, "There's no reports, it's probably a software you installed." I did reset everything, even did a full install from a freshly formatted SSD. Problem didn't change. When I told him about this thread, he didn't care at all. It's truly amazing that one can spend a boatload of money on a new premium device and that Apple doesn't care (and I'm an Apple guy, but this frustrates me!!).

Jun 1, 2020 8:58 AM in response to TheRealCasper

TL;DR called Apple Support regarding this issue, followed their instructions and MacBook is now completely bricked. Got transferred to “senior tech advisor” that said my SMC reset method with T2 chip is not actually an “SMC reset, but a hard reset.” Wouldn’t acknowledge that their instructions just bricked my $3000 computer and told me to go in-store for fix or do Recycling Program for a partial refund Apple gift card.


Hey guys sorry for the long post here but I’m fuming mad at what just went down with Apple Support over this issue.. BEWARE long post


I’ve been having the same problem with the MacBook 16in Pro 2019 waking from sleep would shutdown unexpectedly with the fans going full blast.


This is when sht went down.. I called Apple support and a lady told me instructions to hold down some keys for a reset. After, my Macbook Pro just completely bricked.. It won’t even turn on now, and she was like “It won’t turn on? Tell me your zipcode so I can tell you the nearest store for you to bring it in.”  So I politely asked her to transfer me to a senior tech I could speak to for trying other options before bringing it in.


The “senior tech advisor/specialist” told me I had no options than to bring it into a store.


I explained to him I tried the SMC reset with the T2 chip method pressing the power button for 10 seconds, and he told me “That’s not an SMC reset. That’s a hard reset, so that won’t reset anything internally” 😑


I asked him for other options than bringing it to a store (like a full refund or replacement device) but he said no and told me “You could turn it in for a recycling program for a partial refund on your gift card”😑 


So BEFORE calling Apple Support, I had a fully functioning laptop that shutdown unexpectedly on wakeup. AFTER calling Apple Support, I have a totally bricked MacBook that won’t power on and have to go to a store in-person during COVID-19, and was told that T2 SMC reset is actually a “hard reset” with other alternatives of turning it in for a Recycling Program with partial refund.


Obviously now that my computer just won’t turn on at all, I have no choice but to go to a store in-person, which I reserved as my last resort with the COVID-19 situation. Will update again after my visit from the store.

Jun 1, 2020 9:39 AM in response to Barney-15E

The power button for 10 seconds was a method I tried on my own to get my Macbook to turn on and working (and it worked, until it went to sleep or shutdown)


The reset method as instructed by Apple Support was the full SMC reset you mentioned which immediately disabled the computer and now won’t turn on. What’s really ridiculous about the whole thing is offering the Recycling Program with partial refund, and giving no other option like an exchange of device by mailing it in or full refund compared to visiting the store in-person with the COVID-19 situation and with protests going on.


Edit: also, there is definitely a good possibility that my MacBook might be damaged but as you can tell, most people on this thread have the same underlying problem that tells me it’s not only particular to my case, and it might not be a “damage” issue, rather than a software issue.

Jun 1, 2020 10:06 AM in response to Barney-15E

I appreciate you trying to help me out.


But like I mentioned above, YES I tried all the steps “holding down the power button” for the precursor step AND also the full SMC reset pressing the Control, Option, Shift for 7 seconds then the power button for the actual reset as instructed by the Apple Support.


I’ve never said the 10 second power button press broke my laptop. It never did. If anything, it allowed my laptop to at least get past the login page and prevent it from shutting down unexpectedly again.


I’m not posting this here to necessarily gain any attention from Apple. It’s to help others with the same problem and bring them into the loop with my problem and what my process is.


Like I said above, I AM bringing it in store to have them look at it and will update after my visit.

Jun 1, 2020 11:34 AM in response to Dr-Dri

Wow, that's quite a story.


Would you mind how you were able to get past these "Apple Support Technicians" and over to the engineers? In my observation, it seems like it's just a draw of luck, depending on the Apple Support "Technician" and if they're actually willing to raise the issue to the engineers? And you're not the first person I've heard of being able to eventually reach the engineers to talk with them, so I know it's at least possible.


Apart from this problem, I was dealing with a whole different MacBook Pro 16 in problem regarding blue screens here. And the Apple Support just tells me to go to the "Apple Store," when I just want a confirmation that it's a software/OS problem with one quick talk with the engineers or if they could just quickly confirm Apple is aware of the issue and are working on a fix.


I'm having so many problems with the 2019 16 in 😓 while my mid 2014 13 in MacBook Pro is completely fine..

Jun 2, 2020 6:57 AM in response to Dr-Dri

Good to know this is a software issue. I was a bit worried it was hardware and all the Apple stores are still closed in our country due to COVID19 (and probably won't open up for quite some time. My 16" MacBook was pretty flakey before, kernel panics, running hot with fans for no reason, etc. I did a full reformat and reinstall which didn't fix it. Fortunately, the software update (for me) has solved everything and now it's the workhorse I expected (and really need at this time).


I have the 2.3 GHz 8-Core Intel Core i9 (it would be interesting to know if the continued version are only happening on certain configurations).


As always, it's really important to send in reports.

Jun 2, 2020 8:32 AM in response to Dr-Dri

I have been able to perform a bunch of resets looking things up myself and finally got my MacBook to actually turn on again. (in the process, I realized the lady from Apple Support gave me wrong instructions than listed to perform one of the resets she was having me do 😑)


Regardless, I have also downloaded the supplemental update, but can confirm it did not resolve the issue for me as well. Turning on the MacBook with the external monitor would cause a full fan blow-out and cause the laptop to shutdown while logging in.

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MacBook Pro 16 2019 10.15.4 Kernel Panic / Reboot When Plugged In -- Help!

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