With the professional Mac MP4 to iPhone Converter to convert MP4 to iPhone on Mac OS X, your iPhone is not only a mobile phone, but also a video player.
Download the version your Mac need:
Install it and you can see:

Click "Add Files" button to add MP4 video files
Click Under Output Format option to choose iPhone format(*.mp4).
Click "Browse" button to select the destination folder you want the converted videos to store.

Also you can merge all the converted mts files into one file for watching on iPhone by press"Merge" button!

Click "Start" button to start converting mp4 to iphone.Click "OK" button to finish the conversion.
Note: With iTunes provided by Apple Inc, you can put these converted videos on your iPhone.
OK, now you can enjoy any videos with your iPhone at any time.
Easily Convert MP4 to iPhone on Mac OS X |