Lol, boy have I had some BS with this. I exchanged my P4 and my modded remote, the one I wanted and need to use for any fun, wouldn't connect, well duh! It was because the bird and RC were in different versions, took a while and a lot of cussing, but got it. My problem was even though the other P4 used same cable and MacPro, new one wouldn't update firmware, but the app did update it, now the MacPro connects.