I must admit that I've been busy with my P3P and not used my P2 (with H4-3D and GoPro) for some time so I decided to get it out and recalibrate the IMU, the gimbal and RC. I downloaded the latest software for the P2 and the RC from the DJI website, installed the software, and attempted to do the above calibrations. Nothing. No interface on screen, just the bouncing 'RC' and/or 'PT2' on the task bar. I've changed the USB cable to see if that might be the problem but no. Is it possible that El Capitan is incompatible with the DJI software which is over 12 months old? Any help would be appreciated.