Simply click it to search for AVI files and open. There is a big box of “Open File” in the middle of the screen. Launch the free AVI player for Mac and add AVI content. When the download is done, install the package properly. Go to the official site and click on the “Download AVI player for Mac”. Unlike other media players which have limited format-support, you will. The VLC media player, is an excellent open-source media player that is known for supporting a wide range of audio and video files. Solution 3: Play AVI with a AVI player Mac. For a Mac running Lion or Mountain Lion, converting AVI video to QuickTime is highly recommended.