...yes thanks Ive heard that is a solution for MAC but also heard that the codec H265 also drops out on the 4KDuo Pro so don't really want to risk that happeningYou can try using h265 instead of h264 (default). There is a known issue with using the h264 Pro files on quicktime (I assume that's what your using). Press and hold the MIC button to switch between the two. h265 seems to be OK with Quicktime if I recall.