Hi,the only solution that I found in front of BIAB bugs under Big Sur is unfortunately to go back to Catalina while waiting for the PGmusic team to fix the bugs. It's frustrating to buy an Ultrapack and find that not everything is working with Apple's latest O.S. Rolling back under Catalina was painful because TimeMAchine's backup under Big Sur is unreadable under Catalina. I had to reinstall all my programs to find a fully operational system. This is not a problem for me I am a computer scientist but as a musician I admit that I have other things to do than to find solutions to bugs which have been known for almost two months. PG Music is very good to announce a new 2021 version for PC but Mac users are a bit forgotten when it comes to version tracking