Professional OS X MP4 to MP3 Converter
With high converting speed and output quality, the OS X MP4 to MP3 Converting program is regarded as the most professional MP4 to MP3 Converter running on Mac OS X.
In addition, it supports you to convert MP4 files to many popular formats like Mov, MPEG, AVI, WMV, FLV, DivX... Try its powerful functions!!!
Note: the above mentioned software only support Apple Mac os x system, if you want such a software running on Microsoft windows, please Get its windows version here .
Guide:
Step 1: Free download the OS X MP4 to MP3 converter from the website to your Mac, then launch it. The interface is as below:
Step 2: Add files by clicking the button 
, then the MP4 files you added will be shown in the window of this converting software.
Step 3: Select the output format as MP3 from the drop down box "Profile" .
Step 4: Choose a folder to save the export files by clicking "Browse" .
Step 5: Then click the button 
to start converting, the converting program will convert the mp4 files to mp3 format automatically.
Note: If you want to merge two or more files into one, just click the button 
After the conversion work done, you can enjoy the converted MP3 files now!!!