Quick question - I'm trying RC2 on Ventura x86, I tried to install the Big Sur 2.1.6RC2 package, it installs and completes without errors, however, I don't get the kexts loaded. I rebooted into recovery mode, kmutil trigger-panic-medic etc, reinstalled but approval of the kext was not triggered and I still had no kexts on reboot.
Installing the Catalina RC2 on Ventrua works though and I'll test with that - just curious as to what might be going on with the Big Sur build though.
I've not had a chance to dig into the installer logs or make sure that the old kexts were properly uninstalled (i.e. recovery mode and manually delete them if they're still there). If I get a chance later I'll poke it some more.
Cheers!