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Yeah, I didn't think it would matter either since it was for CPU power management pre 10.13. Good to hear that it helps :)

It turns out the boot argument "-xcpm" prevented acceleration being used on Vega 64. Removing it solves my problem.

Yes, I just noticed. It was a leftover argument that enabled native power management before 10.13, and since deprecated. I didn't think it would affect this but it did. Thanks for your help!

It turns out, the boot argument "-xcpm" prevents AMDRadeonX5000_AMDVega10GraphicsAccelerator from loading, which results in no acceleration.

OK. I'll backup and clean install when I got time. Will report back, thanks!

I tried to turn on Inject Intel in Clover and injecting ig-platform-id 0x3E910003, both GPUs show up in System Information, with "Metal support" field available showing supported, but still there are screen artifacts, and anything that uses Metal (Chrome etc) will lead to a kernel panic and reboot.

From IORegistryExplorer, I can see the framebuffer is properly loaded, even the ports are correct. Somehow it just doesn't have acceleration. Disabling IGPU doesn't help either.

Not clean install, but everything was running fine with my old 7970 card, the only thing changed is the Vega 64.

System Information as seen in the attached screenshot, there's no "Metal: supported" entry. CINEBENCH hangs for a few minutes then fails (also attached screenshot).

Not exactly slideshow, but: 1. Chess is actually playable, but it's not smooth 2. Generally the GUI performs OK, but the Launchpad is not smooth at all 3. Chrome doesn't have its transparency, and everything is flickering. Text on the browser disappears sometimes. 4. FBPatcher shows no QE/CI...

Nothing related to Hackintosh really. All my Hackintosh kexts are in CLOVER/kexts/Other Here's the list of /Library/Extensions: ACS6x.kext ArcMSR.kext ATTOCelerityFC8.kext ATTOExpressSASHBA2.kext ATTOExpressSASRAID2.kext CalDigitHDProDrv.kext HandsOff.kext HighPointIOP.kext HighPointRR.kext...

Hi kyasu1, Did you solve your acceleration problem? I'm experiencing the exact same problem as you do, but I'm on Mojave with Z370 chipset and 8700k, Vega 64.

My PC won't boot with your config, not until I disable the PPMC->PMCR and EC0->EC ACPI patches. And still, no acceleration with my Vega 64. Any ideas?

I haven't tried to replace my whole config.plist except the serial/uuid yet, I'll try later and report back. Thanks!

Hi pastrychef, Thanks for the awesome guide. I'm having almost the same build as you have, i7-8700K, 32GB RAM, Asus Z370-F and Asus Strix RX Vega 64. Actually I just upgraded my GPU to Vega 64, and I haven't been able to get full hardware acceleration whatsoever. I have IGPU enabled with the...