Getting a new Mac Mini for my studio. All the new Macs come with Mavericks, and none are downgradable to older systems. I have seen Mobius not work on Mavericks -- the screen comes up with half the items missing. Also of concern: Logic 9 (or older -- I refuse to submit to Logic X), Pro Tools LE, Waves, Sibelius. Anyone have experience with Mavericks and any of these applications? Thanks!