For those Duet 1 (firewire) owners concerned about updating to Mountain Lion, I wanted to report that so far it is working great in the latest developer preview. I didn't need to reinstall Maestro 2 or anything, just running as normal. Of course your results may vary, but I have had no problems with my Duet since the August 11 Duet software update, through Lion and now Mountain Lion. You should be aware though that Apogee is not going to officially support the 1st gen Duet with anymore software updates, so keep that in mind. For reference this is on a 2009 MBP 2.8ghz core 2 duo.