Let’s say you have a bunch of AVI movies or TV shows on your Mac, and you want to upload them to your iTunes library, either for organization or for importing to your iPod/iPhone. To add AVI files, which is a multimedia container format introduced by Microsoft, to the iTunes library, you need to convert them to an iTunes-friendly format like QuickTime MOV. Below is a step-by-step tutorial on how to convert and import AVI movies to iTunes on Mac OS X.