Im having an issue with the z3ta 2 on the Mac Mini.
 
I load up the AU plugin (I can only use this since Live doesn't accept VST3), and play various programs and they work fine.
 
The problem is when I export audio in Live, the sound becomes out of tune on export.  I haven't tried bouncing manually in realtime but I guess that would work.  I think I am working at 48khz sample rate as well, so I will try at 44.1khz to see if that fixes the issue.