Thanks, Marianna. I've tried 2023.3.1 and 2022.12.4, same issues on both. I'm currently trying 2021.12.9. Databases have been rebuilt (a few times, actually). No Blackmagic, no I/O at all, software only. Sounds like my support case is a dead end, as the M2 Mac Studio isn't technically supported yet. Which I understand, but this mirrors the