Hi, hope someone might be able to help / assist with this one.
I recently upgraded an Imac to macOS Sequoia version15.6.1.
Since upgrading my mac crashes intermittantly. Despite going through closing everything and ensuring all apps are updated etc I just cant seem to put my finger on what is causing the issue.
I took my mac to the Apple Store and they diagnosed that there was an error on the logic board and suggested that be replaced. I was happy to replace as the issue makes it quite worrying when working on larger files on this mac. I had the Logic Board and therefore also a new hard drive installed and got the mac back last week. Today the issue has happened again. I know I could go back to Apple and start again but I wondered if anyone has experienced the same thing and knows of a fix or workaround. I expect this is software driven as Apple have run all diagnostics now and say the machine is good also it didn't do this prior to upgrading the OS.
Appologies for the war and peace message.
The error I get when it restarts is:
Any help is super appreciated
I recently upgraded an Imac to macOS Sequoia version15.6.1.
Since upgrading my mac crashes intermittantly. Despite going through closing everything and ensuring all apps are updated etc I just cant seem to put my finger on what is causing the issue.
I took my mac to the Apple Store and they diagnosed that there was an error on the logic board and suggested that be replaced. I was happy to replace as the issue makes it quite worrying when working on larger files on this mac. I had the Logic Board and therefore also a new hard drive installed and got the mac back last week. Today the issue has happened again. I know I could go back to Apple and start again but I wondered if anyone has experienced the same thing and knows of a fix or workaround. I expect this is software driven as Apple have run all diagnostics now and say the machine is good also it didn't do this prior to upgrading the OS.
Appologies for the war and peace message.
The error I get when it restarts is:
panic(cpu 1 caller 0xfffffff00cb726a0): macOS watchdog detected
Debugger message: panic
Memory ID: 0x6
OS release type: User
OS version: 22P6083
macOS version: 24G90
Kernel version: Darwin Kernel Version 24.6.0: Mon Jul 14 18:18:09 PDT 2025; root:xnu-11417.140.69~8/RELEASE_ARM64_T8010
KernelCache UUID: 82994AA8DEB67575399F9C1918D971DB
Kernel UUID: A19F4255-6D7A-3B75-A4A4-E4DAEE98A4C2
Boot session UUID: 1FD396ED-A444-4045-8510-422E5A5F35DE
iBoot version: iBoot-11881.140.96
iBoot Stage 2 version:
secure boot?: YES
roots installed: 0
x86 EFI Boot State: 0x16
x86 System State: 0x0
x86 Power State: 0x0
x86 Shutdown Cause: 0x7
x86 Previous Power Transitions: 0x70604000400
PCIeUp link state: 0x89271614
macOS kernel slide: 0x1b800000
Paniclog version: 14
Kernel slide: 0x0000000006820000
Kernel text base: 0xfffffff00d824000
mach_absolute_time: 0x869ac8d26b
Epoch Time: sec usec
Boot : 0x68be9832 0x00026a0e
Sleep : 0x68be9836 0x000b9410
Wake : 0x68be9837 0x000114c1
Calendar: 0x68bef646 0x0003916c
Zone info:
Zone map: 0xffffffdc02714000 - 0xffffffe202714000
. VM : 0xffffffdc02714000 - 0xffffffdce8d78000
. RO : 0xffffffdce8d78000 - 0xffffffdd35a4c000
. GEN0 : 0xffffffdd35a4c000 - 0xffffffde1c0b0000
. GEN1 : 0xffffffde1c0b0000 - 0xffffffdf02714000
. GEN2 : 0xffffffdf02714000 - 0xffffffdfe8d7c000
. GEN3 : 0xffffffdfe8d7c000 - 0xffffffe0cf3e4000
. DATA : 0xffffffe0cf3e4000 - 0xffffffe202714000
Metadata: 0xffffffdc00dd8000 - 0xffffffdc025d8000
Bitmaps : 0xffffffdc025d8000 - 0xffffffdc02704000
Extra : 0 - 0
TPIDRx_ELy = {1: 0xffffffde1c8224a0 0: 0x0000000000000001 0ro: 0x0000000000000000 }
CORE 0: PC=0xfffffff00db72aac, LR=0xfffffff00db72aa8, FP=0xffffffeff3a97e60
CORE 1 is the one that panicked. Check the full backtrace for details.
Compressor Info: 0% of compressed pages limit (OK) and 0% of segments limit (OK) with 0 swapfiles and OK swap space
Panicked task 0xffffffe0cf37dec8: 0 pages, 199 threads: pid 0: kernel_task
Panicked thread: 0xffffffde1c8224a0, backtrace: 0xffffffeff3a736b0, tid: 985
lr: 0xfffffff00da330b8 fp: 0xffffffeff3a73720
lr: 0xfffffff00db70954 fp: 0xffffffeff3a73790
lr: 0xfffffff00db6f8c0 fp: 0xffffffeff3a73880
lr: 0xfffffff00d9f16b8 fp: 0xffffffeff3a73890
lr: 0xfffffff00da3319c fp: 0xffffffeff3a73c60
lr: 0xfffffff00e136cc4 fp: 0xffffffeff3a73c80
lr: 0xfffffff00cb726a0 fp: 0xffffffeff3a73cb0
lr: 0xfffffff00cb5b31c fp: 0xffffffeff3a73d10
lr: 0xfffffff00cb6226c fp: 0xffffffeff3a73d60
lr: 0xfffffff00cb5be1c fp: 0xffffffeff3a73e00
lr: 0xfffffff00cb5aae4 fp: 0xffffffeff3a73e30
lr: 0xfffffff00da8e074 fp: 0xffffffeff3a73f20
lr: 0xfffffff00d9fc6cc fp: 0x0000000000000000
Debugger message: panic
Memory ID: 0x6
OS release type: User
OS version: 22P6083
macOS version: 24G90
Kernel version: Darwin Kernel Version 24.6.0: Mon Jul 14 18:18:09 PDT 2025; root:xnu-11417.140.69~8/RELEASE_ARM64_T8010
KernelCache UUID: 82994AA8DEB67575399F9C1918D971DB
Kernel UUID: A19F4255-6D7A-3B75-A4A4-E4DAEE98A4C2
Boot session UUID: 1FD396ED-A444-4045-8510-422E5A5F35DE
iBoot version: iBoot-11881.140.96
iBoot Stage 2 version:
secure boot?: YES
roots installed: 0
x86 EFI Boot State: 0x16
x86 System State: 0x0
x86 Power State: 0x0
x86 Shutdown Cause: 0x7
x86 Previous Power Transitions: 0x70604000400
PCIeUp link state: 0x89271614
macOS kernel slide: 0x1b800000
Paniclog version: 14
Kernel slide: 0x0000000006820000
Kernel text base: 0xfffffff00d824000
mach_absolute_time: 0x869ac8d26b
Epoch Time: sec usec
Boot : 0x68be9832 0x00026a0e
Sleep : 0x68be9836 0x000b9410
Wake : 0x68be9837 0x000114c1
Calendar: 0x68bef646 0x0003916c
Zone info:
Zone map: 0xffffffdc02714000 - 0xffffffe202714000
. VM : 0xffffffdc02714000 - 0xffffffdce8d78000
. RO : 0xffffffdce8d78000 - 0xffffffdd35a4c000
. GEN0 : 0xffffffdd35a4c000 - 0xffffffde1c0b0000
. GEN1 : 0xffffffde1c0b0000 - 0xffffffdf02714000
. GEN2 : 0xffffffdf02714000 - 0xffffffdfe8d7c000
. GEN3 : 0xffffffdfe8d7c000 - 0xffffffe0cf3e4000
. DATA : 0xffffffe0cf3e4000 - 0xffffffe202714000
Metadata: 0xffffffdc00dd8000 - 0xffffffdc025d8000
Bitmaps : 0xffffffdc025d8000 - 0xffffffdc02704000
Extra : 0 - 0
TPIDRx_ELy = {1: 0xffffffde1c8224a0 0: 0x0000000000000001 0ro: 0x0000000000000000 }
CORE 0: PC=0xfffffff00db72aac, LR=0xfffffff00db72aa8, FP=0xffffffeff3a97e60
CORE 1 is the one that panicked. Check the full backtrace for details.
Compressor Info: 0% of compressed pages limit (OK) and 0% of segments limit (OK) with 0 swapfiles and OK swap space
Panicked task 0xffffffe0cf37dec8: 0 pages, 199 threads: pid 0: kernel_task
Panicked thread: 0xffffffde1c8224a0, backtrace: 0xffffffeff3a736b0, tid: 985
lr: 0xfffffff00da330b8 fp: 0xffffffeff3a73720
lr: 0xfffffff00db70954 fp: 0xffffffeff3a73790
lr: 0xfffffff00db6f8c0 fp: 0xffffffeff3a73880
lr: 0xfffffff00d9f16b8 fp: 0xffffffeff3a73890
lr: 0xfffffff00da3319c fp: 0xffffffeff3a73c60
lr: 0xfffffff00e136cc4 fp: 0xffffffeff3a73c80
lr: 0xfffffff00cb726a0 fp: 0xffffffeff3a73cb0
lr: 0xfffffff00cb5b31c fp: 0xffffffeff3a73d10
lr: 0xfffffff00cb6226c fp: 0xffffffeff3a73d60
lr: 0xfffffff00cb5be1c fp: 0xffffffeff3a73e00
lr: 0xfffffff00cb5aae4 fp: 0xffffffeff3a73e30
lr: 0xfffffff00da8e074 fp: 0xffffffeff3a73f20
lr: 0xfffffff00d9fc6cc fp: 0x0000000000000000
Any help is super appreciated