If the extension is MP4, then it's not AVI. If you can post more details (the QuickTime for Mac forum will probably be a better place) about the best HD video player for Mac Pro.
Looking for a professional MP4 player Mac can play HD MP4 movies on iMac / Macbook Air/Pro macOS Sierra? You're strongly advised to get a media play.
VLC Media Player for Mac is a powerful and efficient app for playing all kinds of media in multiple formats right on your Mac. With this app in.
Mp4 player for macbook - wikipedia
Mp4 player for macbook - downloads games
Mac Blu-ray Player FAQ. Capture Every Moment: Transform VLC Player into a Screen Capture App. You can fine-tune your playback using video controls, adjust the speed, correct out-of-sync subtitles. I said this app is cool not only because it is very fast, but also it supports to seclect resolution and get subtitles.. E-mail this to: Enter the e-mail address of the recipient. VLC Player for Blu-ray discs...