To watch MP4 files on Mac (OS macOS Sierra and El Capitan included), one feasible method is take professional Mac MP4 players to use. Play MP4 files on Mac with the professional MP4 player In this article, I will share my experience and offer two commonly used methods to help you open MP4 videos on Mac for enjoying with ease. However, if fruitless, you will have to install other MP4 player to play your videos, or convert MP4 to other video format, like MOV.
Then the player may try to download an appropriate codec to play back the file.
This is because MP4 videos may be encoded with different codec. Even though Mac‘s default media player, QuickTime, supports MP4 video playback, sometimes you may find that you could not play MP4 video with QuickTime. Majority of videos over Internet are available in MP4 format and thus MP4 players are the most commonly used players. The importance of a powerful media player can be well understood by movie freaks who wish to enjoy their favorite videos in best quality.