Kernel Panic Error on 2020 27" iMac

[triangletechie]

On day 2 of owning the $1,999 base model, I had one of these errors. My machine has the stock ram and the only apps I've added were Speedtest and Office. I believe my error was related to the machine going into sleep mode. After doing some research, I decided to check the box next to "prevent computer from sleeping..." under Energy Saver. So far, I haven't had any more errors. Just FYI that the KPs are still occurring. Does anyone think Big Sur could finally put an end to these annoying KPs?

 

[triangletechie]

Looks like I spent $2000 on a lemon. Just had another KP only this time the screen froze and weird blotches on the screen. I guess I’m going back to my old 21”.

 

[BSoares]

Didn’t Apple release a MacOS update a couple of days ago to address an issue related to 2020 iMacs not coming back from sleep? Maybe see if your OS is up to date.

 

[triangletechie]

It came with 10.15.6 installed. I did the supplemental update.

 

[TwoH]

Yikes, that looks like you'll have to return it

 

[mlykke]

Did you do a fresh install on the computer or did you transfer files, apps and settings from an old machine or a time machine backup?

 

[triangletechie]

It was a fresh install. It actually locked up multiple times yesterday. Now it’s getting ready to be dropped off to FedEx. This one was ordered directly from Apple. I'm going to order the same config from Amazon and give it one more shot.

 

[triangletechie]

Just received my new unit from Amazon. So far, so good.

Below is the first KP error I got from the 1st 27" I ordered which has been returned. Hopefully one of you can explain what caused this one.

panic(cpu 0 caller 0xfffffff020860cec): x86 CPU CATERR detected

Debugger message: panic

Memory ID: 0x6

OS version: 17P6610

macOS version: 19G2021

Kernel version: Darwin Kernel Version 19.6.0: Thu Jun 18 20:30:46 PDT 2020; root:xnu-6153.145.1~1/RELEASE_ARM64_T8010

Kernel UUID: 828E8E47-4C82-3639-83B9-4F7DB86934F6

iBoot version: iBoot-5540.140.12

secure boot?: YES

x86 EFI Boot State: 0xe

x86 System State: 0x0

x86 Power State: 0x0

x86 Shutdown Cause: 0x1

x86 Previous Power Transitions: 0x20002000200

PCIeUp link state: 0x94721614

Paniclog version: 13

Kernel slide: 0x0000000018894000

Kernel text base: 0xfffffff01f898000

mach_absolute_time: 0x3582ecc9d8f

Epoch Time: sec usec

Boot : 0x5f3455cc 0x000956f9

Sleep : 0x5f3455d3 0x00007c14

Wake : 0x5f3455d3 0x00094abe

Calendar: 0x5f36ac4b 0x0007b508

Panicked task 0xffffffe00077aa00: 2719 pages, 183 threads: pid 0: kernel_task

Panicked thread: 0xffffffe00094fa18, backtrace: 0xffffffe0167d34b0, tid: 354


lr: 0xfffffff0200ec860 fp: 0xffffffe0167d34f0


lr: 0xfffffff0200ec6bc fp: 0xffffffe0167d3560


lr: 0xfffffff020207770 fp: 0xffffffe0167d3610


lr: 0xfffffff0206b95d8 fp: 0xffffffe0167d3620


lr: 0xfffffff0200ec024 fp: 0xffffffe0167d3990


lr: 0xfffffff0200ec37c fp: 0xffffffe0167d39e0


lr: 0xfffffff020e3a974 fp: 0xffffffe0167d3a00


lr: 0xfffffff020860cec fp: 0xffffffe0167d3a30


lr: 0xfffffff02085211c fp: 0xffffffe0167d3aa0


lr: 0xfffffff020854044 fp: 0xffffffe0167d3b50


lr: 0xfffffff020851854 fp: 0xffffffe0167d3be0


lr: 0xfffffff020818cb8 fp: 0xffffffe0167d3c10


lr: 0xfffffff020626b14 fp: 0xffffffe0167d3c50


lr: 0xfffffff020626398 fp: 0xffffffe0167d3c90


lr: 0xfffffff0206c4514 fp: 0x0000000000000000