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User profile for user: endermAH
endermAH Author
User level: Level 1
8 points

iMac (Retina 5K, 27-inch, 2020) - CPU Machine Check Architecture Error with external monitor

Some time ago i bought new iMac 27 5k to replace my macbook pro 2013

I used my macbook with external display and all was ok, but when I have tried to connect external display to my iMac after few time it reboots with kernel panic. I contacted with Apple support but after long time of discussion and different exercises they said that problem is with my display or usb-c adapter. Today I bought new display and new adaptor in certified shop and met the same problem - after few time working iMac reboots with kernel panic.

Here is the last log:

CPU Machine Check Architecture Error Dump (CPU: UNKNOWN, CPUID: 0x80000009000A0655)
Core: 0 
  IA32_MC3_STATUS=0xBE00000000800400
  IA32_MC3_CTL=0x0
  IA32_MC3_ADDR=0xFFFFFF801EDD91D9
  IA32_MC3_MISC=0xFFFFFF801EDD91D9
Core: 0 
  IA32_MC4_STATUS=0xFE00000000800400
  IA32_MC4_CTL=0x0
  IA32_MC4_ADDR=0xFFFFFF7FAD910930
  IA32_MC4_MISC=0xFFFFFF7FAD910930
Core: 0 
  IA32_MC11_STATUS=0xEE0000000040110A
  IA32_MC11_CTL=0x0
  IA32_MC11_ADDR=0xFF71EC00
  IA32_MC11_MISC=0x47880000086
Core: 0 
  IA32_MC12_STATUS=0xEE0000000040110A
  IA32_MC12_CTL=0x0
  IA32_MC12_ADDR=0xFF71CA80
  IA32_MC12_MISC=0x4B880000086
Core: 0 
  IA32_MC13_STATUS=0xEE0000000040110A
  IA32_MC13_CTL=0x0
  IA32_MC13_ADDR=0xFF71CA40
  IA32_MC13_MISC=0x7880000086


Can anybody help me with this? Thanks

iMac 27″, macOS 11.3

Posted on May 19, 2021 8:26 AM

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User profile for user: MrHoffman
MrHoffman
Community+ 2024
User level: Level 10
117,049 points

Posted on May 20, 2021 5:44 AM

If this 2020 iMac is still under warranty, or is under AppleCare, contact Apple.


Machine checks and panics and CATERR catastrophic errors tend to be low-level software problems, operating system bugs, or bad hardware.


Here’s a pretty good sequence for evaluating these:

https://apple.stackexchange.com/a/394172


Also:

If your Mac restarted because of a problem - Apple Support


In this case, post the EtreCheck data (as an attachment added to a posting here) on the off chance there’s some problematic app here, but I;d suspect either bad Mac hardware, a low-level Apple driver problem, or a bad adapter. Of these, swapping the adapter, cable, and then monitor are probably the easiest to test.


Finding a pattern makes resolving these cases easier.


If applying any available updates for apps and for macOS, and if swapping hardware including swapping that adapter and cable doesn’t resolve this, then contact Apple Support.

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User profile for user: MrHoffman
MrHoffman
Community+ 2024
User level: Level 10
117,049 points

May 20, 2021 5:44 AM in response to endermAH

If this 2020 iMac is still under warranty, or is under AppleCare, contact Apple.


Machine checks and panics and CATERR catastrophic errors tend to be low-level software problems, operating system bugs, or bad hardware.


Here’s a pretty good sequence for evaluating these:

https://apple.stackexchange.com/a/394172


Also:

If your Mac restarted because of a problem - Apple Support


In this case, post the EtreCheck data (as an attachment added to a posting here) on the off chance there’s some problematic app here, but I;d suspect either bad Mac hardware, a low-level Apple driver problem, or a bad adapter. Of these, swapping the adapter, cable, and then monitor are probably the easiest to test.


Finding a pattern makes resolving these cases easier.


If applying any available updates for apps and for macOS, and if swapping hardware including swapping that adapter and cable doesn’t resolve this, then contact Apple Support.

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User profile for user: rkaufmann87
rkaufmann87
User level: Level 10
140,682 points

May 20, 2021 7:30 AM in response to endermAH

Thank you, I have some ideas but before I suggest them please do the following:


Please navigate to www.Etrecheck.com and download the free version of EtreCheck. Once you have you downloaded the app and installed it, please run the report and save it. This report will help us get a good idea what has been installed on your system and help us be able to diagnose what may be wrong.


When you have your report, you can attach it when you reply to this message and we can then review it and help you determine what is needed to get your system running well again. 


For instructions on how to download your EtreCheck report and attach it to your reply to this message please click https://discussions.apple.com/docs/DOC-250000211


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User profile for user: endermAH
endermAH Author
User level: Level 1
8 points

May 19, 2021 3:01 PM in response to den.thed

Now there is new, more informative report

I have found the same issues in google, but no solutions ):

panic(cpu 2 caller 0xffffff8018deba25): userspace watchdog timeout: no successful checkins from com.apple.WindowServer in 120 seconds
service: com.apple.logd, total successful checkins since load (2800 seconds ago): 281, last successful checkin: 0 seconds ago
service: com.apple.WindowServer, total successful checkins since load (2770 seconds ago): 265, last successful checkin: 120 seconds ago
service: com.apple.remoted, total successful checkins since load (2800 seconds ago): 279, last successful checkin: 0 seconds ago

Backtrace (CPU 2), Frame : Return Address
0xffffffa072103670 : 0xffffff8015a8e02d 
0xffffffa0721036c0 : 0xffffff8015bd48e3 
0xffffffa072103700 : 0xffffff8015bc4eda 
0xffffffa072103750 : 0xffffff8015a32a2f 
0xffffffa072103770 : 0xffffff8015a8d84d 
0xffffffa072103890 : 0xffffff8015a8db43 
0xffffffa072103900 : 0xffffff801629d6f4 
0xffffffa072103970 : 0xffffff8018deba25 
0xffffffa072103980 : 0xffffff8018deb660 
0xffffffa0721039a0 : 0xffffff801621eede 
0xffffffa0721039f0 : 0xffffff8018deaa34 
0xffffffa072103b20 : 0xffffff801622911b 
0xffffffa072103c80 : 0xffffff8015b80401 
0xffffffa072103d90 : 0xffffff8015a936ad 
0xffffffa072103e00 : 0xffffff8015a69c85 
0xffffffa072103e60 : 0xffffff8015a812a2 
0xffffffa072103ef0 : 0xffffff8015ba91fd 
0xffffffa072103fa0 : 0xffffff8015a33216 
      Kernel Extensions in backtrace:
         com.apple.driver.watchdog(1.0)[57B278ED-0B7C-3544-9CFE-53963BB1DAF3]@0xffffff8018de9000->0xffffff8018debfff

Process name corresponding to current thread: watchdogd
Boot args: chunklist-security-epoch=0 -chunklist-no-rev2-dev chunklist-security-epoch=0 -chunklist-no-rev2-dev

Mac OS version:
20E241

Kernel version:
Darwin Kernel Version 20.4.0: Thu Apr 22 21:46:47 PDT 2021; root:xnu-7195.101.2~1/RELEASE_X86_64
Kernel UUID: 068F99A3-1DB3-31C0-87D5-09942F122BB6
KernelCache slide: 0x0000000015800000
KernelCache base:  0xffffff8015a00000
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User profile for user: endermAH
endermAH Author
User level: Level 1
8 points

May 20, 2021 5:29 AM in response to rkaufmann87

And here is a new report :(

panic(cpu 0 caller 0xfffffff01eceecc0): x86 CPU CATERR detected
Debugger message: panic
Memory ID: 0x6
OS release type: User
OS version: 18P4556
macOS version: 20E241
Kernel version: Darwin Kernel Version 20.4.0: Thu Mar  4 23:34:36 PST 2021; root:xnu-7195.101.1~1/RELEASE_ARM64_T8010
Kernel UUID: DB327D3C-24A5-3F54-941A-9BA44B8A6971
iBoot version: iBoot-6723.101.4
secure boot?: YES
x86 EFI Boot State: 0xe
x86 System State: 0x0
x86 Power State: 0x0
x86 Shutdown Cause: 0xec
x86 Previous Power Transitions: 0x20002000200
PCIeUp link state: 0x94721611
Paniclog version: 13
Kernel slide:      0x0000000016df4000
Kernel text base:  0xfffffff01ddf8000
mach_absolute_time: 0xaa5b955c55
Epoch Time:        sec       usec
  Boot    : 0x60a584ed 0x00021f2d
  Sleep   : 0x60a5fbfc 0x0009880b
  Wake    : 0x60a5fcdb 0x00068071
  Calendar: 0x60a65379 0x000b3ff5

Panicked task 0xffffffe199c70630: 2865 pages, 189 threads: pid 0: kernel_task
Panicked thread: 0xffffffe199e2b600, backtrace: 0xffffffe81093b700, tid: 420
		  lr: 0xfffffff01e4eb42c  fp: 0xffffffe81093b750
		  lr: 0xfffffff01e4eb284  fp: 0xffffffe81093b7c0
		  lr: 0xfffffff01e616938  fp: 0xffffffe81093b890
		  lr: 0xfffffff01eb0d5fc  fp: 0xffffffe81093b8a0
		  lr: 0xfffffff01e4eafb8  fp: 0xffffffe81093bc20
		  lr: 0xfffffff01e4eafb8  fp: 0xffffffe81093bc80
		  lr: 0xfffffff01f447200  fp: 0xffffffe81093bca0
		  lr: 0xfffffff01eceecc0  fp: 0xffffffe81093bcd0
		  lr: 0xfffffff01ecdd050  fp: 0xffffffe81093bd30
		  lr: 0xfffffff01ecdef4c  fp: 0xffffffe81093bdc0
		  lr: 0xfffffff01ecdc6f4  fp: 0xffffffe81093be50
		  lr: 0xfffffff01ebe1dac  fp: 0xffffffe81093be80
		  lr: 0xfffffff01ea6490c  fp: 0xffffffe81093bec0
		  lr: 0xfffffff01ea6418c  fp: 0xffffffe81093bf00
		  lr: 0xfffffff01eb185a0  fp: 0x0000000000000000
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iMac (Retina 5K, 27-inch, 2020) - CPU Machine Check Architecture Error with external monitor

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