iMac restarts automatically

My iMac restarts automatically with the following issue report. Please help to find the reasons. Thanks.


panic(cpu 1 caller 0xfffffe0010d51e54): assertion failed: hport != 0, file: /System/Volumes/Data/SWE/macOS/BuildRoots/38cf1d983f/Library/Caches/com.apple.xbs/Sources/xnu/xnu-7195.141.6/bsd/skywalk/namespace/netns.c, line: 977

Debugger message: panic

Memory ID: 0x6

OS release type: User

OS version: 20G165

Kernel version: Darwin Kernel Version 20.6.0: Mon Aug 30 06:12:20 PDT 2021; root:xnu-7195.141.6~3/RELEASE_ARM64_T8101

Fileset Kernelcache UUID: 6304A06696A657F4CF48CC569B129642

Kernel UUID: DA16DC13-5845-3638-9BB4-B14F9AC08E55

iBoot version: iBoot-6723.140.2

secure boot?: YES

Paniclog version: 13

KernelCache slide: 0x0000000008934000

KernelCache base: 0xfffffe000f938000

Kernel slide: 0x000000000947c000

Kernel text base: 0xfffffe0010480000

Kernel text exec base: 0xfffffe001054c000

mach_absolute_time: 0x52102c9bd97

Epoch Time: sec usec

Boot : 0x634aa81b 0x00007dcc

Sleep : 0x00000000 0x00000000

Wake : 0x00000000 0x00000000

Calendar: 0x634e3df1 0x0007e04d


CORE 0 recently retired instr at 0xfffffe00106bed50

CORE 1 recently retired instr at 0xfffffe00106bd688

CORE 2 recently retired instr at 0xfffffe00106bed50

CORE 3 recently retired instr at 0xfffffe00106bed50

CORE 4 recently retired instr at 0xfffffe00106bed54

CORE 5 recently retired instr at 0xfffffe00106bed54

CORE 6 recently retired instr at 0xfffffe00106bed54

CORE 7 recently retired instr at 0xfffffe00106bed54

CORE 0 PVH locks held: None

CORE 1 PVH locks held: None

CORE 2 PVH locks held: None

CORE 3 PVH locks held: None

CORE 4 PVH locks held: None

CORE 5 PVH locks held: None

CORE 6 PVH locks held: None

CORE 7 PVH locks held: None

CORE 0: PC=0xfffffe00105c5a48, LR=0xfffffe00105c5a40, FP=0xfffffe3fdc11bee0

CORE 1 is the one that panicked. Check the full backtrace for details.

CORE 2: PC=0xfffffe00105c5a48, LR=0xfffffe00105c5a40, FP=0xfffffe3fd9d43ee0

CORE 3: PC=0xfffffe00105c5a48, LR=0xfffffe00105c5a40, FP=0xfffffe3fdb87bee0

CORE 4: PC=0xfffffe00105c5a48, LR=0xfffffe00105c5a40, FP=0xfffffe309fd63ee0

CORE 5: PC=0xfffffe00105c5a48, LR=0xfffffe00105c5a40, FP=0xfffffe3fb7ad3ee0

CORE 6: PC=0xfffffe00105c5a48, LR=0xfffffe00105c5a40, FP=0xfffffe3fda213ee0

CORE 7: PC=0xfffffe00105c5a48, LR=0xfffffe00105c5a40, FP=0xfffffe3fdcc5bee0

Panicked task 0xfffffe1666774688: 179411 pages, 478 threads: pid 0: kernel_task

Panicked thread: 0xfffffe166896c000, backtrace: 0xfffffe3fdcaa2210, tid: 2300

lr: 0xfffffe001059ab44 fp: 0xfffffe3fdcaa2280

lr: 0xfffffe001059a928 fp: 0xfffffe3fdcaa22f0

lr: 0xfffffe00106c41ac fp: 0xfffffe3fdcaa2310

lr: 0xfffffe00106b5658 fp: 0xfffffe3fdcaa23c0

lr: 0xfffffe00105537e8 fp: 0xfffffe3fdcaa23d0

lr: 0xfffffe001059a5b8 fp: 0xfffffe3fdcaa2760

lr: 0xfffffe001059a5b8 fp: 0xfffffe3fdcaa27d0

lr: 0xfffffe0010d4ce74 fp: 0xfffffe3fdcaa27f0

lr: 0xfffffe0010d51e54 fp: 0xfffffe3fdcaa2820

lr: 0xfffffe0010b3d95c fp: 0xfffffe3fdcaa28a0

lr: 0xfffffe0010b3d4ec fp: 0xfffffe3fdcaa2900

lr: 0xfffffe00108ee574 fp: 0xfffffe3fdcaa2c00

lr: 0xfffffe00108e9f6c fp: 0xfffffe3fdcaa2e90

lr: 0xfffffe00108e94e4 fp: 0xfffffe3fdcaa2fb0

lr: 0xfffffe0010907320 fp: 0xfffffe3fdcaa3010

lr: 0xfffffe001096950c fp: 0xfffffe3fdcaa33b0

lr: 0xfffffe00109662fc fp: 0xfffffe3fdcaa35b0

lr: 0xfffffe0010964c24 fp: 0xfffffe3fdcaa3730

lr: 0xfffffe00108991fc fp: 0xfffffe3fdcaa3770

lr: 0xfffffe0010864334 fp: 0xfffffe3fdcaa3840

lr: 0xfffffe0010857474 fp: 0xfffffe3fdcaa3870

lr: 0xfffffe0010856f00 fp: 0xfffffe3fdcaa3a60

lr: 0xfffffe0010842ac4 fp: 0xfffffe3fdcaa3cb0

lr: 0xfffffe0010856ce0 fp: 0xfffffe3fdcaa3ea0

lr: 0xfffffe00108578c8 fp: 0xfffffe3fdcaa3f00

lr: 0xfffffe001055cc38 fp: 0x0000000000000000


last started kext at 3398288065993: com.apple.driver.usb.IOUSBHostHIDDevice 1.2 (addr 0xfffffe0010308000, size 16384)


Posted on Oct 17, 2022 10:55 PM

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2 replies

Oct 19, 2022 4:29 PM in response to Hugo_Peng

Hi there Hugo_Peng,


If your iMac is restarting unexpectedly, follow these steps to start from If your Mac restarted because of a problem:

Check your software
If the issue is caused by software on your Mac, one of these steps might help:
Install all available software updates.
• If your Mac suspects that a particular app caused the restart, it might ask whether you would like to move the app to the Trash. Click Move to Trash, then contact the software developer to see if a software update is available.
• Use safe mode to try to isolate the cause of the issue.
Reinstall macOS. If the issue continues after reinstalling macOS, check your hardware.


If you continue to experience unexpected restarts after following all the sections of that article, contact Apple Support.


We hope that helps!


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iMac restarts automatically

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