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No worries. I'd still do what I suggested above, since the dortania guide gives you the latest OpenCore build.

Oh, wait, sorry! Didn't pay attention to your GPU. It's not supported in Catalina. You have to install High Sierra in order to make it work.

@Shaneee it didn't work. Are you skilled enough to be able to make out what my issue could be in the thread that I posted? perhaps confirm that it's a GPU issue?

Ah, okay. My suggestion is this: 1. copy all of the contents from your install usb, make a folder in your computer and paste the contents there. 2. follow this guide: https://dortania.github.io/OpenCore-Install-Guide/ - it requires you to format your drive and start all over. You might have...

One step further then. I would copy/paste your first build to the mac and build the dortania one from the bottom up. ACPI issues looks like a usbx-issue, since that is the only file supposed to be in that folder (according to my setup at least, and we’re close).

Try the dortania amd OS X guide, see if that works for you.

Searched some more, and the '1730'-error is seemingly a GPU error. If the addition of AppleAlc 1.5.2 isn't doing the job, I'll be looking into config.plist loading a stock frequency bios for my GPU. I don't know how to do that though, so pointers in that direction are also welcome.

Nice! I'm going to incorporate that into my build, see if it fully boots then.

Where did you find AppleALC v. 1.5.2?

I am sitting on an Ryzen 5 3600x MSI B450i Kingston KVL 2666 Club3D r9 280x Firecuda 2tb nvme and have been through Dortania guide, read it thoroughly, built my own installer, had a mate from the Discord build what should be a working config.plist and tried booting from both. It's not working...