Hello, I am trying to connect the Alesis DM7X drum module to my macbook pro via USB. The device shows up in "about this mac", on "system report" under the "USB 3.0 Bus" tab. But it doesn't show up in Audio and Midi setup no matter how many times i press "scan for devices". It works normally on my Mac mini, but all the other USB devices work fine on my macbook too. What could be the problem? Thank you in advance.