AudioBooktoMP3.com has announced Audiobook Converter for Mac 3.8.1, an update of the audiobook DRM removal software for Mac.

The utility is designed to help users remove DRM protection from iTunes M4B audiobooks and Audible AA, AAX audiobooks while while converting the DRM M4B, M4A, AA, AAX audiobook files to unprotected MP3, AAC, M4A, AIFF, AU, M4R and FLAC. It now supports batch audiobook conversion so that you can convert multiple audiobooks with a single button.

Audiobook Converter requires Mac OS X 10.6 or later. It's priced at US$29.95 for a personal license.