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Thank you for the answer. I've managed to run Big Sur successfully! There was no big problem with my previous configurations. I just newly installed from beginning then everything worked fine... Perhaps some corrupt files caused my previous failure. My final config attached with serial number...

Hi LisaAlterEgo, I have the similar hardware like @MasterAmp and I'm also stuck on upgrading Big Sur from 10.15.7. I just can't boot to the MacOS Installer. The interesting part is there is no kernel panic and the apple logo shows, that means the graphics driver works well. But soon the logo...

I encountered a similar issue with the back LineIn jack. All audio devices were showing correctly except the rear line-in didn't work properly. I did see pop noise when inserting a microphone but couldn't record any sound. The front line-in worked just fine. Then I found a solution by modifying...

Hi Damian555, Thanks for your files. They work on my side. Beside I managed to make AppleALC fully working. Please try out the attachment.