I have tried to search for this problem on the board but almost impossible to find a thread with the search engine. Anyway, maybe someone can help. I was able to connect the transmitter to the rc assistant on my macbook a couple of weeks ago. Today I connected my 2V+ no problem but when i connected the transmitter and it was not seen by the computer. Has anyone else had this problem? Do I have a bad mini usb connection or is it worse and my Tx is broken on the communication side? I have tried multiple cables and even opened the Tx up to ensure all connections and connectors were secure. I can still control the Phantom, I just can't connect to the Tx to calibrate or change the mode, etc. Thx… What is the email address or DJI support?