Because you used makemkv to decrypt it or if you talking about live maybe you used anydvd that removes the requirements of an Intel CPU for UHD.
This is of course if we are talking about UHD regular bluray or DVD always worked on and CPUs
This drive does work out of the box with MakeMKV. I have tested it on both Mac and PC with good results and no fails. I even made a video showing it work. https://youtu.be/vLLNUUTUnSk
Below is a link to the drive on amazon that I purchased from that worked out of the box without flashing.
I know this is an older thread but I am hoping someone can help me. I cannot get this drive to rip a UHD disc on either Mac or Windows. I only have one UHD disc, which is a movie called Rad so I'm not sure if it's the movie itself. Regular Blu-Rays work just fine, but with this I get several errors. Allow internet access is enable on both the Mac and PC. Please see my attachment images.
MakeMKV can't rip UHDs until that status is Enabled.
MakeMKV says that drive is a Pioneer BDR-XS07U, revision 1.03. I think that puts you in the camp of people with Pioneer drives that are too new. See this thread: Pioneer firmware update February 2023