I too am running Alibre Expert on a iMac under MacOS 10.15.7 (Catalina) using Parallels Pro 16.1.1. So far, it has worked perfectly.
Two things were needed for this to be workable.
First, a real 3-button mouse is needed. The Apple mice do not work. I use a LogitechM-UAE96 (three buttons, center is also a scroll wheel), but there are many workable choices.
Second, you will need to upgrade physical memory in the Mac. My iMac is old enough that DRAM cost had dropped significantly, so I maxed DRAM out, at 96 GBytes. Installing memory in the iMac was easy. I've never added memory to a MacBook Pro, but I bet it's easy as well. On the iMac, there is a special door, so one need not disassemble the Mac.