I just stopped at the Bestbuy couple days ago, and while i was there I checked out those shiny new imac they have at Apple booth, and I was surprise that those new imac systems are slower than my 8yrs old system. And how's that possible for my old system are more snappier and faster than the...
Let's look at the catalina 10.15.1 AppleGraphicDevicePolicy.kext. ConfigMap with a list of board-id and config1,2,3 assigned to it. I assumed anyone who is using board-id that has "none" will be greeted with a blackscreen if you don't have WEB 1.3.4 to disable this kext when update to 10.15.1...
I prefer to keep boot required kexts like fakesmc.kext/VirtualSmc.kext and WEG in EFI, without them system won't boot. All others can be in either location EFI or L/E folders, just a matter of preference. Avoid to have them in both places, it may conflict.
So it seems system with AMD gpu need Lilu.kext and WhateverGreen.kext ver. 1.3.4 for Catalina 10.15.1 to boot.
AMD gpu is not so natively supported by OSX after all.
Some tricks to make your hack like a real mac if you don't already know:
Misc->Boot->ShowPicker = NO
This will boot directly to default macos, set in Preference-Start-Up disk or first macOs it found if not set (equivalent to Clover fastboot setting).
Most of real mac preboot keyboard command...
The problem was solved with latest commit yesterday, it's not yet made it in the release build yet. There are daily builds provided by one of its forked repo, I don't want to post the link here, but you can look it up.
For legacy clover install:
Delete the files below if they are in...
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