I'm just starting to test on a MBP - so far seems to work fine (I'm new to Mac OS 10.9 as well). I'm testing w/ both a single USB 3 cable and through an active repeater extension.
Annoyances:
Not sure if new or typical - it seems to take ~45s to register the camera after disconnect/power off. Would be nice to have a Rescan command.
No AF control from the computer?
The multiple focus area feature seems like it would be nice for focussing w/ tilt/swing, but not available for Nikons?