- Joined
- Oct 21, 2011
- Messages
- 229
- Motherboard
- HP ProDesk 600 G4 mini
- CPU
- i5-8500 | Q370
- Graphics
- UHD 630
- Mac
- Classic Mac
- Mobile Phone
Thank you. I don't think I can use your Haswell EFI directly, but I looked through it and what I have see seems all correct. I went through all sections, even generated SSDTs for my machine, but the audio device still does not show in the Sound System Preferences. Like I wrote elsewhere, I am using a USB sound adapter so I have sound. I was doing the same on Catalina, but since everything works even better on Big Sur I thought I would look into getting the ALC221 working as well. Maybe someone has other ideas.