Try MakeMKV + VLC — MakeMKV can decrypt/stream a Blu‑ray to VLC so you don’t have to rip the whole disc, and that’s what I use when a free player chokes on a commercial release. It runs under Rosetta on my M1 machine and the Buffalo drive worked fine when plugged directly (avoid cheap unpowered hubs or give the drive its own power), and also check the drive region if you get errors. Free players like Leawo/VLC will play unprotected discs, and there are paid “Blu‑ray Player” apps, but many of them don’t handle AACS/BD+ reliably and disc menus are usually hit‑or‑miss on macOS.