How to Make Iphone Ringtone on a Mac

There will be introduced a simple and free way to create and sync your own custom ringtones to the iPhone. The first thing you'll need to do is download and install the latest update of Mac Video Converter from Aimersoft Official Website.

Steps:

1. Load video or audio and trim it.Click the "Add Files" button to browse your computer hard disc and add the video files you want to convert to the program. After video loaded, click 'trim' button to open the Trim window, then set the start time and end time by dragging the start time and end time slider to convert a clip from your movie on Mac OS X.
   
   
   
2. Convert video or audio to AAC and change the file extension to M4R
3. After shorten the video or audio, you need to select an output format as AAC format, just by click “Format” pull-down list.
   
   
   

   After shorten the video or audio, you need to select an output format as AAC format, just by click “Format” pull-down list.
4. Then start “Convert”, after finished the convert, click “Open” button to quick find the converted .aac audio. Open a File Explorer window and browse to the iTunes music folder. Search for the M4A file: this is the music you have converted. Change file extension to M4R.
   
   
   

   Then start “Convert”, after finished the convert, click “Open” button to quick find the converted.
   The .m4r file is now a ringtone file
5. Set the song as your ringtone
6. As soon as you change the file’s extension, it’ll appear as an iTunes ringtone that you can import into iTunes straight away with just a double click. The new ringtone will be show up on the iTunes interface, ready to be synced to your iPhone.
   
   
   

   As soon as you change the file’s extension, it’ll appear as an iTunes ringtone that you can import into iTunes straight away with just a double click.
   Source: www.wikihow.com