Oddly enough, the VST version works fine but with the AU version, the UI is not accessible. OSX 10.9
Weird, OK, thanks for the feedback. There will be an Aalto update soon, so please let me know if this clears up or not after the 1.5 update.
Update: bit the bullet and upgraded to the new Maschine 2.0 software. Audio unit works fine.
Good to hear, thanks for the info.