Apple apps such as QuickTime Player, Photos and Keynote work with many kinds of audio and video formats. Some apps prefer specific formats, but QuickTime movie files (.mov), most MPEG files (.mp4, .m4v, .m4a, .mp3, .mpg), some AVI and WAV files, and many other formats usually work in most apps without additional software.
Older or specialised media formats might not work in your app, because the format requires software designed to support it. If that happens, your app won’t open the file or won’t play back its audio or video.
Therefore, the playback of AVI through QuickTime on Mac or PC's will mostly depend on the type of compression (or codec) of the AVI itself. Is there any way to play.avi files in QuickTime without considering its video & audio codec? How to watch AVI movie files via the QuickTime player on a Mac/ PC. Go to the official site and click on the “Download AVI player for Mac”. When the download is done, install the package properly. Launch the free AVI player for Mac and add AVI content. There is a big box of “Open File” in the middle of the screen. Simply click it to search for AVI files and open.
You might already have an app that supports the format of your file. If you don’t know which of your installed apps to try, your Mac might be able to suggest one:
If none of your installed apps can open the file, search the Internet or Mac App Store for apps that can play or convert the file: