Mac Book pro 16 crashing

Every time I open my macbook I get the message ( You computer restarted because of a problem )


panic(cpu 0 caller 0xffffff801d491b2c): Sleep transition timed out after 180 seconds while notifying clients about upcoming system capability changes. Suspected bundle: com.apple.iokit.IOGraphicsFamily. Thread 0x74.


I have tried a fresh install with the same problem. Any ideas?

MacBook Pro 16", macOS 10.15

Posted on Apr 18, 2020 5:25 PM

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Posted on Apr 19, 2020 8:10 AM

Had the same problem


Status here

My GPU Panic sleep problem is still solved. I have since installed my video-rendering tools, my developer tools, all my other stuff.

My energy saving stuff is back to normal.

Having it gooing to sleep on power, on batteries

Running 10.15.4


Solution for me was

My brand new macbook pro 16 (Shipped 2. april 2020) also restarted (crashed) over nigth - actually it crashed (Kernel Panic GPU) everytime it went to sleep mode. I had nothing installed except default OSX with updates.


Solution details

  1. Reset: Pram & NVRAM (still crashed)
  2. Reset: SMC (still crashed)
  3. Internet Recovery Command+Option+R (when booting) (Crashed under installation, but continued afterwards)
  4. Disabled "Prevent computer from sleeping automatically when the display is off." & "PowerNap.." in Energy Saver settings (Problems disappeared)
  5. Two days later I enabled "Prevent computer from sleeping...." and "Powernap..." again (Still no problems)


I don't know if step 1-3 is necessary, but I think so.


So a macbook pro 16 that I almost returned, is now working perfectly - and I'm very happy:-)


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47 replies
Question marked as Top-ranking reply

Apr 19, 2020 8:10 AM in response to Jafra83

Had the same problem


Status here

My GPU Panic sleep problem is still solved. I have since installed my video-rendering tools, my developer tools, all my other stuff.

My energy saving stuff is back to normal.

Having it gooing to sleep on power, on batteries

Running 10.15.4


Solution for me was

My brand new macbook pro 16 (Shipped 2. april 2020) also restarted (crashed) over nigth - actually it crashed (Kernel Panic GPU) everytime it went to sleep mode. I had nothing installed except default OSX with updates.


Solution details

  1. Reset: Pram & NVRAM (still crashed)
  2. Reset: SMC (still crashed)
  3. Internet Recovery Command+Option+R (when booting) (Crashed under installation, but continued afterwards)
  4. Disabled "Prevent computer from sleeping automatically when the display is off." & "PowerNap.." in Energy Saver settings (Problems disappeared)
  5. Two days later I enabled "Prevent computer from sleeping...." and "Powernap..." again (Still no problems)


I don't know if step 1-3 is necessary, but I think so.


So a macbook pro 16 that I almost returned, is now working perfectly - and I'm very happy:-)


May 4, 2020 1:20 PM in response to kristof461

Safe Mode is called Safe Mode because it does not damage or change ANYTHING. It is SAFE.


Hold shift at startup, and your computer will start to boot up, then spend five minutes doing a disk directory check, then demand your userid and password to proceed. ONLY a minimal set of Apple-only extensions are loaded, and defaults are assumed for everything. Screen re-draw will be wonky and slow, but ultimately correct.


Things that work OK in Safe Mode, but not in regular mode are caused by "something you added".

May 4, 2020 12:11 PM in response to DPJ

What should I do? As I said before I had kernel panic panic(cpu 0 caller 0xffffff8011291b2c): Sleep transition timed out after 180 seconds while notifying clients about upcoming system capability changes.

Had because after disable power nap and prevent monitor.... everything works fine. One disadvantage is that after hibernation I can turn on Mac only with power button. Anyway that’s fine for me. I can work with these settings. Anyway I have still opportunity to send it back. Time till Friday. What would you do? Return or not?

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Mac Book pro 16 crashing

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