I don’t know if people are aware of this plugin - but its supposed (for example - amongst many things) - to allow VSTs to be used within OSX and obviously it works in Windows too e.g.
- Can be used as a VST to AU wrapper
- VST3 plugins now supported, so VST3 to AU, VST3 to RTAS and VST3 to AAX is possible as well. Plus, of course, VST3 to VST or VST to VST3.
- Internal bridge from 32 to 64 bit, with seamless plugin window integration: load 32 bit plugins in ProTools or LogicPro X without the need for a 3rd party bridging solution
It has a user interface very similar to GP’s own and is pretty cheap at around 40 dollars and there is a demo version.
I bought it a couple of years ago to use with Forte as the latter didn’t support VST3 - but MetaPlugin did. Unfortunately - I could never get it to work within Forte (Forte’s fault).