www.makemkv.com

What I'm not getting is that it works in 1.15.1, but not in 1.16.5. Same discs, same drive, same Mac. Only difference is the MakeMKV version.

OS device name: /dev/rdisk9
Current profile: BD-ROM
Manufacturer: HL-DT-ST
Product: BD-RE BP06LU10
Revision: HL03
Serial number: KVDB1EF4409
Firmware date: 2010-12-06 12:34:56
Highest AACS version: 70

LibreDrive Information
Status: Possible, might be supported in future, but not likely soon
Drive ...

Since upgrading to 1.16.5 on MacOS 11.6 I get an error "This disc uses a newer version of ACCS+ encryption", even on discs I have opened on an earlier version 1.15.1, I downgraded back to 1.15.1 and can open discs again.

Any ideas why this would be?

Thanks,

Mike