For those who use these great instruments (and I am sure that there are many of us) it may be very interesting that Spectrasonics uses a system very similar to the Vienna Ensemble:
When you select the Atmosphere or Trilogy Wrapper plug-in in your DAW, it will launch a corresponding Atmosphere Host or Trilogy Host application. The applications will appear in your Dock.
Inside of your DAW, the Intel-Mac wrapper plug-in transmits MIDI information to the Atmosphere/Trilogy Host, which in turn sends the Atmosphere/Trilogy audio back to your DAW via the wrapper plug-in.
This solution is designed to be nearly identical to the native plug-in experience - with the MIDI and Audio routing working automatically and plug-in settings saved and recalled with the song.
christof