SmartWare 1.3.6

I just downloaded SmartWare but it does not recognize my external drives (My Book and My Passport), it only recognizes my internal harddrive.  Any ideas on what the problem might be?  I have an iMac running OS X (10.8.5).

Thanks

Figment444,

Would you kindly share the exact models of your WD My Book and WD Passport models? Some of them are not compatible with WD SmartWare on Apple Mac OS systems.