www.makemkv.com

Using a Pioneer BDR-XS07S
Disk does not open with Mac OS, opens fine with Windows 11.

likly a key error you need to get the hk on the mac why its blocked idk
coule be this and more...
firewall
dns
vnp
try using/disabling or changing all those and see if it works

Moved the drive from my Windows machine back to my Mac Studio.
The disk loads and opens fine now. I did nothing, so, probably just a sensitive disk that's not perfectly clean.