Working method that fixes audio issues in macOS Tahoe.

[ghost]

This is for anyone needing help to fix Audio in macOS Tahoe. Tested on Non T2 iMac (should hopefully work on T2 but untested)

Warning: Your SIP level must be at 0x803 or lowered!

Step 1. Install KDK of the macOS version you're running (eg; 26.5.2) https://github.com/dortania/KdkSupportPkg/releases
Step 2. Download MyKextInstaller (https://github.com/Mirone/MyKextInstaller)
Step 3: Download the AppleALC Kext (it says on GitHub MyKextInstaller to use the HDA kext but when you're inside the app itself you have to use the ALC kext) https://github.com/acidanthera/AppleALC/releases/tag/1.9.7
Step 4: Launch MyKextInstaller
Step 5: Install kexts
Step 6: Select the AppleALC.kext file
Step 7: Reboot your Mac (you won't have to rebuild or install OpenCore or redo Root Patches)