Haven't tried my ArtZ tablet with OS X yet. Post your type of USB to ADB adapter and what USB adapter driver version and maybe others can help on that configuration part. In my ArtZ manual it says in summary that red light=ADB power is being received OK (good news), and if Stylus is detected (not just touching but either pressed down, or button pressed) on the tablet the light should turn green. A quick test on a 9.1 ADB only system with no Wacom driver installed and I get this red status light turning green while stylus pressed behavior.