How to play AVI files on MacBook Pro Using GoPro software, I had imported videos to PC. However when I bought a new macbook pro, I transferred all files onto an external Hard Drive. They are currently in .avi format. I am struggling to play the video files on the MacBook, as the file type is not supported. 

How can i play .avi files ?
VideoLAN's VLC is the way to go here, I haven't found a movie file that it can't play.