Help! Can't get Build and Run to work on Nexus 7 and Mac ML

I’ve tried everything and I just can’t get the build and run on unity to connect to my new nexus 7 android device.
It builds fine but Unity gives me a message saying it can’t find any connected android devices. ADB devices shows no devices, If I run the android file transfer app I can transfer stuff to and from the nexus 7 but Unity just won’t see the device.

Any ideas guys? I’m pulling my hair out. (Oh I activated developer mode on the nexus too), I even tried the other camera protocol.

Fixed it! unlocking development mode on the Nexus said it had enabled USB debugging mode, but it lied. It enabled the developer options which allowed you to then enable USB developer mode!

had the some problem. thanks for posting this.

I’m running windows7 pro and I can’t get it to see the Nexus 7 at all. All these developer options are turned on.