I'm also on OSX I've found using the 1m via USB rather fustrating. It initially worked, however literally the following day it wasn't been recognised in my DAW (Logic X).

How did you overcome this issue (if you had any issues at all that is...).

On saying that, I've reverted to using oldskool MIDI (for polyphony) and CV (when patched up) more opten than not.

Great little synth though, I really like it's sound.