Kernel Panic after switching logic board

posef770 wrote:

It seems that your reply is missing some information, perhaps links that were edited by the moderator.

Yeah, the moderators were very aggressive and gutted all the links which is a shame since people could get bogus/dangerous software without the proper links. Their reason was it contained links not directly related to the OP's question. Why they left the rest of the post is beyond me. When they gutted the links they also took the text from the hyperlink.

I tried to mention performing a SMC reset

https://support.apple.com/en-us/HT201295

and PRAM reset

https://support.apple.com/HT204063,

, but the moderators took away ALL the links even to their own Apple articles.

I will try running a few HD youtube videos on Safari, see if that triggers the kernel panic.

It is better to find some HD trailers to actually download and run them in Quicktime.

I tried the Apple Hardware test (power-D), I got the following error:

Error: 0x8000000000000003, cannot Load 'EFI/Drivers/TestSupport.efi'.

Status: 0x00000003

Others have reported this issue. It seems Apple has broken something.

What did finally cause the kernel panic was opening Chrome and a few heavy google spreadsheets.

It could be triggered by one of your Chrome extensions. Chrome also has an advanced setting to enable hardware graphics acceleration. You can try disabling this setting.

BTW, after these kernel panic, it normally takes a few hard resets to get the machine booted again.

This reinforces the hardware failure aspect.

For another perhaps more intensive GPU test, you can try one of the Unigine Demo Benchmarks

https://benchmark.unigine.com/

The Heaven demo might be able to run on your laptop.

It wouldn't hurt to run the Apple Hardware Test in loop mode if possible. Diagnostics don't always catch all types of failures though.

To test the GPU, you can try running "" which should mostly focus on the GPU and not the CPU. I haven't had any luck running gputest with the GUI on recent versions of macOS although a co-worker seems to have no problems running it. I usually have to run gputest from the Terminal command line using the following command:

open  <path-to-gputest-app>  --args  '/fullscreen  /mpaa=4  /test=fur'



You can just type "open " without the double quotes, then drag & drop the "gputest" app (non-gui version) onto the Terminal to auto-fill the path "<path-to-gputest-app>". For other tests and options open up the shell script (the file ending in ".sh") using TextEdit. One undocumented test which I also like is "/test=pixmark_julia_fp64", but it isn't as strenuous as the "furmark" test listed previously.

open  <path-to-gputest-app>  --args  '/fullscreen  /mpaa=4  /test=pixmark_julia_fp64'

You will need to give GateKeeper permission to run the app the first time by going into the Security Setting System Preferences. Press Esc while the test is running in fullscreen to quit the qputest.

Another good way to test the GPU is by downloading several HD trailers and running them in loop mode simultaneously using Quicktime. I like to overlap the various movie windows to make the computer work a bit harder.

Try an and (hold the PRAM reset for at least three chimes).

You can monitor system fans and temperature using.

To stress test the CPU and memory, try running "" in Torture Test mode.

To test just the memory try creating a bootable USB drive using. the USB drive and select the orange icon labeled "EFI". Once Memtest86 is running you can safely remove the USB drive. The latest free version 8.2 unfortunately does not allow running the test for more than four loops. You can download the older free which I believe allows the loops to be increased beyond four. Use the Memtest .img file as the source for Etcher.

[Link Edited by Moderator]

I am with HWTech in suspecting the GPU. Almost every entry under "Kernel Extensions in Backtrace" points to the GPU.

Looks like a GPU issue. I would suspect a bad Logic Board.