I can confirm the cable was my issue as well. I thought for sure it wasn't (until I read this thread) because I had already suspected that, and tried multiple cables on 4 different PC and Macs. Lo and behold the last cable I tried just magically worked. I guess it's possible the one they shipped was damaged in some way or not manufactured exactly per the USB specs and the other cables I had were simply power passthrough with no data channel and I didn't realize it. Either way, it works now!