Webroot AntiVirus 3 Devices 1 Year Type: Antivirus Operating Systems Supported: Windows & Mac OS System Requirements: Operating Systems: Microsoft Windows XP 32- and 64-bit SP2, SP3 Windows Vista 32-bit (all Editions), Windows Vista SP1, SP2 32- and 64-bit (all Editions) Windows 7 32- and 64-bit (all Editions), Windows 7 SP1 32- and 64-bit (all Editions) Windows 8 32- and 64-bit Windows 8.1 32- and 64-bit Windows 10 32- and 64-bit Mac OS X v.10.7.3 Lion Mac OS X v. 10.8 Mountain Lion Mac OS X v. 10.9 Mavericks Mac OS X v.10.10 Yosemite Mac OS X v.10.11.1 El Capitan Minimum System Requirements: Intel Pentium / Celeron family, or AMD K6 / Athlon / Duron family, or other compatible processor 128 MB RAM (minimum) 10 MB Hard Disk Space Microsoft Internet Explorer 7.0 and higher, Mozilla Firefox 3.6 and higher (32-bit only), Google Chrome 10.0 or higher Internet ...