iMac Retina 5K, 27-Inch 2020 Crashes

Question

Level 1

4 points

iMac Retina 5K, 27-Inch 2020 Crashes

Hi, Often on my iMac the screen turns green, and the iMac get irresponsive. I need to press the button to turn it off and then I get the following error message. What is wrong?

panic(cpu 0 caller 0xfffffff01098d078): x86 CPU CATERR detected

Debugger message: panic

Memory ID: 0x6

OS release type: User

OS version: 22P3051

macOS version: 23H417

Kernel version: Darwin Kernel Version 24.3.0: Thu Jan 2 20:06:28 PST 2025; root:xnu-11215.81.4~2/RELEASE_ARM64_T8010

KernelCache UUID: C4927E81A8EF71EF971180EB427BDEAA

Kernel UUID: 5E0311EE-A5B2-37BF-A7AE-F303066BB6B6

Boot session UUID: 72F051CF-92F2-4774-86A2-14CFB0D1B3DB

iBoot version: iBoot-11881.81.2

secure boot?: YES

roots installed: 0

x86 EFI Boot State: 0x16

x86 System State: 0x0

x86 Power State: 0x0

x86 Shutdown Cause: 0x0

x86 Previous Power Transitions: 0x70604000400

PCIeUp link state: 0x89271614

macOS kernel slide: 0x9e00000

Paniclog version: 14

Kernel slide: 0x000000000a624000

Kernel text base: 0xfffffff011628000

mach_absolute_time: 0x445d76116b

Epoch Time: sec usec

Boot : 0x67da9c61 0x000bba07

Sleep : 0x67d9911a 0x00061fba

Wake : 0x67d9911a 0x000efc39

Calendar: 0x67dacef7 0x00037c47

Zone info:

Zone map: 0xffffffddfb4b4000 - 0xffffffe3fb4b4000

. VM : 0xffffffddfb4b4000 - 0xffffffdee1b18000

. RO : 0xffffffdee1b18000 - 0xffffffdf2e7e4000

. GEN0 : 0xffffffdf2e7e4000 - 0xffffffe014e48000

. GEN1 : 0xffffffe014e48000 - 0xffffffe0fb4ac000

. GEN2 : 0xffffffe0fb4ac000 - 0xffffffe1e1b14000

. GEN3 : 0xffffffe1e1b14000 - 0xffffffe2c817c000

. DATA : 0xffffffe2c817c000 - 0xffffffe3fb4b4000

Metadata: 0xffffffe3fb4c4000 - 0xffffffe3fccc4000

Bitmaps : 0xffffffe3fccc4000 - 0xffffffe3fcdf0000

Extra : 0 - 0

TPIDRx_ELy = {1: 0xffffffe0fb517260 0: 0x0000000000000000 0ro: 0x0000000000000000 }

CORE 0 is the one that panicked. Check the full backtrace for details.

CORE 1: PC=0xfffffff011972a64, LR=0xfffffff011972a60, FP=0xffffffddd104be60

Compressor Info: 0% of compressed pages limit (OK) and 0% of segments limit (OK) with 0 swapfiles and OK swap space

Panicked task 0xffffffe2c8110fa8: 0 pages, 198 threads: pid 0: kernel_task

Panicked thread: 0xffffffe0fb517260, backtrace: 0xffffffddd0f4f6b0, tid: 992

lr: 0xfffffff011836020 fp: 0xffffffddd0f4f720

lr: 0xfffffff0119708fc fp: 0xffffffddd0f4f790

lr: 0xfffffff01196f9f0 fp: 0xffffffddd0f4f880

lr: 0xfffffff0117f56bc fp: 0xffffffddd0f4f890

lr: 0xfffffff011835a60 fp: 0xffffffddd0f4fc60

lr: 0xfffffff011f25454 fp: 0xffffffddd0f4fc80

lr: 0xfffffff01098d078 fp: 0xffffffddd0f4fcb0

lr: 0xfffffff0109765ac fp: 0xffffffddd0f4fd10

lr: 0xfffffff01097cba8 fp: 0xffffffddd0f4fd60

lr: 0xfffffff010976ff4 fp: 0xffffffddd0f4fe00

lr: 0xfffffff010975dc0 fp: 0xffffffddd0f4fe30

lr: 0xfffffff011891980 fp: 0xffffffddd0f4ff20

lr: 0xfffffff0118006c4 fp: 0x0000000000000000

Thanks

iMac 27″

Posted on Mar 19, 2025 7:39 AM

Reply

Answer 1

den.thed

Level 10

84,898 points

Mar 19, 2025 8:08 AM in response to D_Sonten

Those hieroglyph writings only tell us that something happened.

To dig deeper for some real answers, you need to get and use EtreCheckPro.

Download and run the free version of EtreCheckPro, from > https://etrecheck.com/en/index.html

Then post back here with your Report, as per > How to use the Add Text Feature When Post… - Apple Community

Reply

Answer 2

D_Sonten Author

Level 1

4 points

Mar 24, 2025 2:04 PM in response to den.thed

Hi, I have tried to use Etrecheck but it cannot complete the process even if I start the Mac in safe mode. I have many peripheral attached of witch 2 Caldigit Thunderbolt Docks one is Tb3 and the other Tb4. I have attached a second monitor to the Thunderbolt 3 dock and I have discovered that if I disconnect the second monitor I do not have anymore the problem. I really need in my Recording studio a second monitor and I need to find a solution. Any suggestions?

Thanks

Reply

Answer 3

rkaufmann87

Level 10

146,834 points

Mar 24, 2025 2:33 PM in response to D_Sonten

Prior to doing your Safe Mode restart please shut down, then disconnect ALL wired peripherals (USB, Thunderbolt, Firewire etc..) and the plug keyboard into the iMac using the charging cable that came with the computer. When starting in Safe Mode, please hold down the Shift Key until the computer fully starts in Safe Mode (it will show Safe in the upper right of the display). Then download and run EtreCheck.

Your KP's may be caused by one of the peripherals, RAM (if you upgrade that yourself) or software.

If you cannot overcome the problems then your only recourse is to take the computer to your local Apple Authorized Service Provider to be serviced.