If you can’t play an audiobook
If you can’t play a file you downloaded from the Audible website, you might have exceeded the number of computers authorized to play the Audible file. Or you may be trying to listen to an Audible file that was purchased using someone else’s account.
Spoken programs purchased from the iTunes Store can be played on up to five computers at a time. (You can’t play these files on a sixth computer until you deauthorize one of the already authorized computers.)
Spoken programs purchased from the Audible website can be downloaded to up to three computers at a time.
To deauthorize a computer:
If the item was purchased using your Apple or AOL account, choose StoreÂ > Deauthorize Computer on the computer you’ll no longer use to listen to your Audible purchases (the computer must be connected to the Internet). Then choose â€œDeauthorize Computer for iTunes Store Account.â€
If the item was purchased using your Audible account, choose AdvancedÂ > Deauthorize Audible Account on the computer you’ll no longer use to listen to your Audible purchases (the computer needs to be connected to the Internet).
To see where a file was purchased, select it, choose FileÂ > GetÂ Info, and then look in the Kind field. Files purchased from the iTunes Store end in â€œ.m4b.â€ Files purchased from the Audible website end in â€œ.aaâ€ or â€œ.aax.â€
To see who downloaded an Audible file, select it in the library and choose FileÂ > Get Info. The Purchased By or Owner field shows the user name for the account holder who downloaded the file.