Step 1: Download Xilisoft Video Converter for Mac, install and run it. If you are Windows user, please download the Windows version.

Step 2: Load M4V files.
Click "Add File(s)" button to load your M4V files.

Step 3: Set output format and output folder.
Choose M4V files you want to convert, and click "Profile" drop-down button to choose output file format. You can choose "AVI - Audio-Video Interleaved (*.avi)", "DivX Movie (*.avi)" or "XviD Movie (*.avi)". See AVI? DivX? XviD? What's the difference?

Click "Browse" button to choose destination folder for saving your converted AVI video files.

Step 4: Convert.
After choosing the format, you only need to click "Convert" button on the toolbar to complete the M4V to AVI conversion task.

Ok, done.

If you're interested in this M4V converter program, please visit: Xilisoft Video Converter for Mac.