I have two Jewelbots. I tried updating both of their firmware and uploading the solo coding mode's hello world program (1 green LED)--no problem, the lights turned purple when in upload mode, and the green light comes on when the Jewelbots are unplugged.
However, after I switched to Friendship Coding Mode and tried to upload the sample program, both of them have become unresponsive. I don't remember the exact sequence of steps, but when plugged in, I don't see a red charging light. When I press the reset button, both of them do the rainbow animation, then do it again after a minute for some reason, and both remain unresponsive. Also just hitting the Magic Button at any point doesn't seem to turn on or off the the Jewelbots (no response).
Any help would be greatly appreciated. I'm on OS X 10.11.