hey @toldea thanks. This is what I did so far. I uninstalled VoodooHDA by drag/dropping the .kext file from S/L/E. Then from your guide, I downloaded AppleALC.kext and mounted EFI > KEXT > Other (screenshot attached) Then I tried to run command downloaded from your guide (audio_codecdetect_v2.3.command). Then it gave me the no permissions error (attached) I have changed permissions to admin, user, others to "Read & Write" but still gives me that error when I double click. Please help!!!!