Sorry for the bizarre request, but could someone post his kext list in /Library/Extensions? Possibly a "virgin" BigSur system.
I imported my data from an HD that was mounted on a MacMini 2011 running Catalina thanks to macOS Catalina Patcher and I think I also imported extensions that I could...
i had the same problems with the fenvi and my x570 taichi.
I solved it using the IntelBluetoothFirmware.kext kext in EFI
without the kext MacOS confuses devices by referring to the BT as an Ericsson dummy. However, once the kext was inserted my fenvi started working without giving any problems...
I'll try trying to create an SSDT-BRG0, as long as I can understand something !!
Honestly, more than seeing AppleTV on the ryzentosh I would like to solve the blackscreen problem that recurs from time to time.
Maybe with SSDT-BRG0 I solve that as well
I copy what Hackintool identify, trying to resolve my blackscreen problems
I added eternet because without it was recognized as external and the others built-in are storage, without are recognized as external hard disks.
of course, I had already entered my radeon data to try to remedy my blackscreen problems.
I have 4 matches
Navi 10 XL Upstream Port of PCI Express Switch
Navi 10 XL Downstream Port of PCI Express Switch
Navi 10 [Radeon RX 5600 OEM / 5600 XT / 5700/5700 XT]
Navi 10 HDMI Audio
... and I can add, with unfairgva set in DeviceProperties I get a nice kernel panic right after the opencore picker.
I will wait for the release version, hoping that something changes or ... that some Intel users have the same problem !!
preamble: balckscreen is my major problem and I partially resolve as I wrote here, https://forum.amd-osx.com/index.php?threads/blackscreen-handcrafted-solution.1507/#post-7729
Reverting to the last WEG release, 1.4.6, all go back as usual