Hi,
I'm on Windows.
Can't you just check the path on your other computer?
Also does'nt a MAC have a file search tool like Windows have?
The files is where you installed them.
Perhaps you can find useful info in Ableton help. Like this:
https://help.ableton.com/hc/en-us/articles/209068929-Using-AU-and-VST-plug-ins-on-Mac and other help sites.
The files that a installer install is located different places.
When you said manual migration, did you mean, that you have'nt run the minimoog v installer? It only take a minute to run the installer. I don't know, but i can imagine that at least the standalone version need to be installed to work. I don't know, and i also don't know if the plugins need you have run the installer to work. That depend on, if some data need to be registrated in the machine code. Many programs need to be installed to work, at least on Windows - and i guess it's the same on a MAC.
Be sure you know what you do, if you move stuff.
As you have your Minimoog V running on Catalina, then it does'nt look like a Minimoog V issue to me.