Robin - this is supported natively? I can just drop Windows VST plugins into my Mac setup with the latest version of Ardour?
No, you can use Mac VSTs, that most VST vendors provide.
Ah gotcha. Ok, so still no support for older VSTs that are no longer in production or have Mac VST versions?
Running plugins written for one operating system on a different operating system is not a good idea. That’s the bottom line. Whether or not it is possible doesn’t change that fact.