Hmm well no I don't really have any ideas, I haven't heard of anyone else having the same issue. One thing is for sure and that is FPV Freerider itself hasn't changed (it doesn't use automatic updates). Perhaps your Macbook has received some kind of update. Did it just stop recognizing it all of a sudden? Do you see any movement on the little circles as you go though the Calibrate Controller procedure in Freerider? The other thing I guess might be if something changed on the transmitter. Make sure you have Joystick mode selected on the transmitter (not USB mass storage).