It's not a Catalina thing. How long have you done music on Mac? Went through this with Snow leopard. Then with Mountain Lion. I can't install Rapture, Dimension Pro or Z3ta from Cakewalk after Mountain lion. Again Windows 10 just fine. Mac is a horrible platform for music and if I didn't do mobile development I would drop it in 5 seconds. Mac has literally become a joke in the computer music community.