You will have to run the program first, then choose the M4V video for playing. Quick Time Player: When you right click on the M4V video to play with Quick Time Player, it won’t work. Also, the iTunes player doesn’t offer extended features as other free players do to improve the user experience. But by doing so, every time we launch iTunes, it takes relatively longer time to respond and consume quite a lot of Mac resources for its running. ITunes: iTunes itself is a powerful and full-feature program to manage all kinds of files on Mac, which entails a lot of features to meet users’ needs. In fact, there are 2 media programs comes with macOS can play M4V on Mac, iTunes and Quick Time Player, but many Mac users choose not to use them for:

M4V is applied to encode video files in iTunes, and that’s the reason why we often call M4V files as iTunes files. M4V is the video format developed by Apple to contend with MP4 format and it can be protected by DRM copy protection. Convert M4V to MP4, MP4 HEVC, MKV, M4A, iPhone, etc.Take snapshots of your favorite movie moments.Customize shortcuts to control Play/Pause, Stop, Step Forward/Backward, etc.Support embedded and external subtitles.Play videos in 4k, 1080p, 720p, or any other resolutions.Support Dolby, stereo, DTS multi-channel surround sound.Play audio and video in a wide range of formats, like M4V, FLV, WMV, etc.Cisdem Video Player is a freeware to play M4V on Mac.

Final media player mac