Operating System Supported: Windows 7, Windows Vista, Windows XP
Mac OS X, v10.2x*–10.5x
*Users of Mac OS X v10.2.x / v10.3x must install enclosed IntelliPoint software before connecting the hardware.
System Requirement: 100 MB HD for Windows 7, Windows Vista, Windows XP (excluding Windows XP 64-bit) OS, 30 MB HD for Mac OS X v10.4x - 10.6x OS, 1 AA battery (included)