With Mac MP4 to AVI, the professional MP4 to AVI Converter for Mac OS X, you can easily convert MP4 video to AVI format on Mactonish.
Free download the software:
This is the screen:

Firstly: add mp4 files you want to converted.
Secondly: choose avi format.

Click Trim button to open trim window, here you can drag the start time and End Time slider to convert a clip from your movie on Mac OS X.
Click Crop button to remove the black edges or just convert part of the video area from your video file.
Click Effect button to set the video brightness, contrast, saturation and video volume.

Thirdly: select the destination folder.

Forthly: start converting MP4 to AVI.
With the powerful MP4 to AVI Converter for Mactonish, it is so easy for you to convert MP4 to AVI on Mac OS X.
Convert MP4 to AVI on Mac OS X |