I have Komplete Kontrol installed in a directory with other VSTs which is MAC/Users/Shared/VST which seems to work OK. The stuff that came with C10 has installed in Mac/Lib/AppSupport/Steinberg/Content/ .
Does it matter that all the VSTs that I want to access with Cubase are in different directories?
On OSX are two places only.
/user/yourName/Library/Audio/Plug-ins/VST (you must use “Go to” by pressing option key to enter this Library path)
or
/Library/Audio/Plug-ins/VST