Online Video Converter
A great option that lets you convert your AVI files, without having to download a separate Mac AVI player is https://convert-video-online.com. It’s free and straightforward to use.
- Click "Open File" to select the AVI file you want to convert.
- Choose the video or audio output format (eg. MOV, MP3) and resolution you want from the available options listed.
- When you’re ready, hit "Convert" and this tool will start its magic. In a few minutes, your newly converted file will save to your Mac and is ready to play with QuickTime.