Type: External Operating Systems Supported: Mac OS X, Tiger, Leopard, Snow Leopard Features: Dimensions: 6.5" x 5.3" x 1.9" Weight: 2.6 lbs. Formatted for Mac Compatible with Apple Time Machine Automatic, continuous backup Visual drive control center Password protection and 256-bit encryption Package Contents: External hard drive WD SmartWare software (pre-loaded) USB cable AC adapter Quick Install Guide Parts: 2 years limited Labor: 2 years limited