More info: http://www.apiesoft.com/audio/convert-mp4-to-mp3-on-mac.html MPEG-4 Part 14 or MP4 is a multimedia container format standard specified as a part of MPEG-4. It is most commonly used to store digital video and digital audio streams, especially those defined by MPEG,

1. How to Convert MP4 to MP3 on Mac
http://www.apiesoft.com/audio/convert-mp4-to-mp3-on-mac.html

2. MPEG-4 Part 14 or MP4 is a multimedia container format
standard specified as a part of MPEG-4. It is most
commonly used to store digital video and digital audio
streams, especially those defined by MPEG, but can also
be used to store other data such as subtitles and still
images. Like most modern container formats, MPEG-4
Part 14 allows streaming over the Internet. A separate
hint track is used to include streaming information in the
file. The only official filename extension for MPEG-4 Part
14 files is .mp4.

3. MP3 Converter for Mac supports convert any formats audio, like
AAC, AC3, AIFF, FLAC etc to MP3 and audio from video like
MP4, MOV, DV, MPEG, WMV, AVI etc to MP3 on Mac.
Guide: How to Convert MP4 Video to MP3 on Mac
Step 1: Free download and run
MP4 to MP3 Converter for Mac on your Mac OS.

5. Step 2: Click "Add File" to input the files you want to convert.
Also this MP4 to MP3 Mac software support batch conversion.

6. Step 3: Setup output format as MP3 from the drop-down list of
"Profile", then click "Browse" button choose the destination to
save the converted MP3 files.

7. Step 4: After you have finished the settings. Just click
"Convert" button to convert MP4 Video to MP3 Mac.
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