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Yes, is normal. Preference due to frequency vectors. Still, iMacPro1,1 stands best so stick to that. Are you using stock VBIOS? The picture you attached, happens mostly due to memory corruption. It could be your RAM or the memory chips on the GPU (aka GPU itself). EFI is not as per the...

Did an upgrade recently and it works absolutely fine. Until you make the changes as listed above, you'll be in loop in either of the macOS version. So, better you make those changes to enjoy the system :)

Here a few observations: - The deice-id shouldn't be needed in the SSDT-GFX0. Plus, if the connectors are being recognized natively and they're proper, you shouldn't require injecting @0,connector-type. - The Thunderbolt SSDT you're using is not appropriate. See the HotPlug guide to build...

Great. So, all fixed now?

Your EFI is not as per the guide. Start here:

Limited support here means you cannot have all the Graphics function such as metal.

EFI is corrupt.

Is that SATA SSD? No, it does not work fully. Just partial that is why it is experimental. The EFI you attached is corrupt as well.

@Ezger What's the boot drive model? Seems like an NVRAM issue. Attach your EFI to check!

Can you attach About This Mac photo and Hackintool PCIe info?

Attach the EFI you're using.

Are you able to boot now?

That's funny. Provided that your Laptop has APU Enabled (not factory disabled), you should be able to install. Your configuration is not as per the guide and you have also not changed the CPU core count. Start here:

You don't need Load Early setting. The error is due to Secure Boot. Disable Secure Boot in BIOS and you should be good!

Hello and Welcome to EliteMacx86!

Hello and Welcome to EliteMacx86!

Attach the copy of EFI you're using.

Can you remind what needs to be corrected here?

You'll likely have to inject EDID.

Attach the complete EFI.