System Requirements PC with USB port Windows 8/ Windows 7 / Windows Vista / Windows XP (32-bit) / Mac OS X (v10.7 to 10.9) Internet connection (for driver installation) At least 200mb of hard disk space Razer Synapse 2.0 registration (requiring a valid e-mail), software download, license acceptance, and internet connection needed to activate full features of product and for software updates. After activation, full features are available in optional offline mode.