Unfortunately you can’t use a MAC to transfer Audible.com content to a Sansa. The issue is that Audible does not provide the software needed to transfer their files to a Sansa for MAC OS. Itunes does have a component for Audible built in, however itunes does not work with anything except an ipod. To transfer the Audible content you will need a Windows PC and you will need to use Audible manager to transfer the content to your Sansa.
Not i got Windows PC from one of my friend and i have installed Audible Manager on it but my Sansa ClipZip is not Showing Up in Audible Manager however it is recognizing on computer
When i connect player Audible Manager says Sansa is not connected or In Use , What is the Solution
I have the same problem with oneclickdigital. I found that by looking at the internal memory (looking at the device after clicking on “computer”), there was a file set up as e-audiobooks. I just transfer the file to the audiobooks folder. It shows up as unknown no matter how I rename it, but at least I can listen to it.