Why can I use OverDrive Audio Book titles on the Mac®?
OverDrive Audio Book titles, provided by OverDrive, Inc., use DRM protection technology from Microsoft Corporation. The Mac operating system does not support DRM-protected WMA files. OverDrive, along with hundreds of online digital media providers, is hopeful that Apple and Microsoft can reach an agreement that would enable support for Microsoft-based DRM-protected materials on the Mac.