A 1.3 GHz dual-core processor for high performance and ultra-fast transfer speeds. Up to 16TB of centralized storage for your entire network. Simple system management for personalized backup. Windows-Windows 10, Windows 8 or 8.1 Windows 7, Windows Vista, Mac OS X- El Capitan (Mac OS 10.11) Yosemite (Mac OS 10.10) Maverick (Mac OS 10.9) Mountain Lion (Mac OS 10.8) Lion (Mac OS 10 Note-Compatibility may vary depending on your computer’s hardware configuration and operating system).