I have issues installing the latest standalone version 19.12.12 on Mac OS Catalina 10.15.2 - DMG mounts but once I try to drag it to a local location, I get and error message:
The operation can’t be completed because you don’t have permission to access “Manager”.
Also tried 19.12.11 and this also gives me the error message. I had an old version 19.2.81 lying around and this works fine.
Trying to copy with terminal gives this message:
cp: Manager.app/Contents/MonoBundle/ManagerDesktop.exe: Operation not permitted
Mono bundle with Windows executables exists on older, working version as well, so there must be something that Mac OS dislikes with the newer files. Disk permissions are same for both, but even with sudo the newer files cannot be accessed.