I have the new Mac Pro as well: 16 core, 192 GB, AMD Radeon Pro Vega II with an Atto H680. I can’t get ArGest 4.0 to work at all. The application produces segmentation faults when executing the bru binary.
My support ticket was started on the third of February and I have sent the logs from the terminal commands and debug/crash reports they have requested. It has now been two weeks since I heard anything from them.
I use BRU/ArGest for archiving old projects to tape and I am so happy that I don’t have to depend on BRU for my daily backups since those are disk and cloud based on QNAP and Synology. I don’t have access to my classic Mac Pro unfortunately, so I am just hoping they resolve all the Catalina issues before I need to restore anything business critical from my tape archives.