I am running OSX on a really old iMac. Something after Snow Leopard. I got Moviemator because there was some problem with iMovie, although I have forgetten what. Although completely unrelated, Moviemator works about as well as the Chrome browser on OSX, that is to say a few minor delays but it does not crash. It is good enough I wonder what the $ version is like. I have not used the feature but I like the way you can do audio only on it and export as mp3.