How do I convert M4B to MP3 on Mac?

Convert M4B files to MP3 using To MP3 Converter:

1. Open To MP3 Converter.
2. In the Finder, select a few M4B files or folders containing them.
3. Drag files, selected in the Finder, and drop them into To MP3 Converter, to start M4B to MP3 conversion.
   
4. Click on the links in the Progress Window to access new MP3 files.

Read More: How to convert to MP3 - Getting Started >>
Read More: Improving Drag & Drop Experience >>

Please note, M4B files can come with the DRM protection. DRM protected audio is not supported and cannot be converted because of the App Store policies.
Read More: Input Formats >>