2 VLC
When it comes to free and open-source media players, VLC is the top dog. If you’ve run into trouble with supported media formats with the native QuickTime app, or you simply want something a bit more powerful, VLC is probably your best bet.
It’s incredibly versatile and is constantly being updated. As a result, VLC can play basically any media file — and it offers a range of customization options for power users. It sports a deeper set of tools for media playback, streaming and conversion in a minimal and clean interface.