Hi, I just purchased a new Z2 & X1 mk2 & neither can be seen by Traktor or the Controller Editor. I've followed all advice from NI & forums, updated/re-installed the drivers & still no luck. The lights briefly flicker on when connected but then they stay off, this is the same for both Z2 & X1. Not sure what to do. I'm running Mac OS 10.10.5. The only light that stays on is the usb light on the Z2, all other lights are off & buttons/knobs are dead. I'd be incredibly grateful for any help or advice. Thank you for your time.