2016 MBP with AMD dGPU and AMD eGPU. Neither GPU workS with any version of MacOS installed with OCLP but works fine in the official Monterey. I never had this issue prior to last week.

At this point I’m completely baffled. I have used OCLP on my MacBook Pro 13,3 for years and never once had a single issue. I went from Monterey to Ventura seamlessly, and same with Sonoma. I have been running Sonoma since OCLP began supporting it, including all major updates.

Last week I reformatted just to get a fresh start, not because anything was wrong. This is something I’ve done dozens of times before.

Ever since I reinstalled MacOS Sonoma my AMD dGPU hasn’t worked correctly. I get apps crashing with the console app showing issue with MTLCompilerService. But it works fine in the officially installed Monterey via Internet Recovery.

Thinking maybe the dGPU is just too old, I decided to get an eGPU since I’d like the performance boost anyway. But nope that doesn’t work either.

If I connect the eGPU with no monitor attached I can see that the “Radeon Pro W5700” is detected perfectly fine. The moment I connect a monitor the internal screen goes black, the monitor doesn’t detect a signal for about 30sec and once it does I just get a white screen, sometimes with pink and cyan pixels scatted randomly.

Rebooting with the monitor connected to the eGPU produces the same result.

If I reboot with the monitor connected to the eGPU and immediately close the laptop before it starts booting MacOS then after staring at a blank screen while it boots, I will get a bright greenish yellow screen with the MacOS cursor once I have finished booting. I can move the cursor for a few seconds before I’m kicked back to the verbose output (which is now showing on the eGPU).

In the output I don’t see anything related to any GPUs and the last messages that stand out are;

ASP: ASP: shutting down

X86PlatformPlugin: :systemWillShutdown!

IOPlatformHaltRestartAction -> AppleSMC

And that’s it, the computer locks up on this screen until I force the computer off by holding the power button. And if I open the laptop at this point the internal display is off, not just black but completely turned off.

Infuriatingly the eGPU works just fine in Monterey. But I can’t use Monterey, several apps I use don’t support it anymore plus with e2e encryption for iCloud not being introduced until Ventura I can’t even sign into my iCloud account anyway.

I also tried Ventura which produced the same results as Sonoma, despite having used every version of Ventura on this same computer before. I have also tried using older versions of OCLP all the way back to the initial release to add support for Sonoma.

Sorry for such a long post but I’m at a total loss, and completely confused at this point.