Not only don’t you speak Mac but you seem to not be aware Audacity as host app for these 64bit VST’s needs to be 64 bit according to a search on compatibility. And in this search I got Steve Daulton’s spelling it out to be the case…
https://forum.audacityteam.org/t/is-there-available-audacity-64-bit/49444/1
What a mess! This is why I don’t troubleshoot computers for a living.
Thanks for posting that ToneBooster PDF to confirm I’m going to stick with the Discman MegaBass processor.