Mac computer with USB 2.0 port. Mac OS X v10.4.11 or later. iTunes 8 or later7. Windows system requirements. PC with USB 2.0 port. Windows Vista or Windows XP Home or Professional with Service Pack 3 or later. iTunes 8 or later6. Environmental requirements. Operating temperature: 0° to 35° C (32° to 95° F). Nonoperating temperature: -20° to 45° C. (-4° to 113° F). Relative humidity: 5% to 95% noncondensing. Maximum operating altitude: 3000 m (10,000 feet).