In my case, still having troubles. Succeed to update from 14.3 to 14.4.1 by disabling SecureBootModel, but the same trick does not work for 14.5... Gonna try re-downloading Sonoma app and disabling the only BT kext I have (no WiFi hardware, Ethernet en0) Didn't work. I guess the thing that might have broken the update is VirtualBox 6.1.x, which I installed with SIP partially disabled, but before trying to update I re-enabled SIP and reseted NVRAM...