Great, thanks. I'll do some more testing as well. There's a chance that it was a fluke, and a reboot could fix it.Once the public release becomes available, I'll download a fresh installer and perform a clean installation on a new APFS container to see if I can replicate the issue. My setup includes an i9 processor and a 5500M GPU, so we should expect similar results. I still haven't experienced the red flashing or any graphics corruption