• Designed for Mac & Time Machine ready • Password protection with hardware encryption • Reimagined design • Easy to use • Trusted drive built with WD reliability • Formatted for Mac OS X • Up to 4TB capacity • USB (Universal Serial Bus) 3.0 port; USB (Universal Serial Bus) 2.0 compatible • 2-year limited warranty Designed for Mac My Passport for Mac portable storage works straight out of the box with Mac devices which makes it easy to get going quickly – drag & drop files to & from, or setup a backup routine with Apple’s Time Machine software to help protect your photos, videos, music & documents. Password Protection with Hardware Encryption The My Passport for Mac drive’s built-in 256-bit AES hardware encryption with WD Security™ software helps keep your content private & safe. Just activate password protection & set your own personalized password. You can also add a “return-if-found” message as the password prompt to help your My Passport for Mac drive find its way back to you if it ever accidentally gets left behind. Reimagined Design The bold, vibrant design of the My Passport for Mac drive is sure to stop you in your tracks. It is portable storage reimagined to complement your own personal style. Easy to Use My Passport for Mac portable storage is ready to use out of the box so you can start transferring files, saving your memories & backing up right away. It comes with WD Security software to help protect your data & is compatible with Apple Time Machine. System Requirements • Formatted HFS + Journaled Mac OS X Mountain Lion, Mavericks, Yosemite & El Capitan • May require reformatting for other operating systems • Compatibility may vary depending on user’s hardware configuration & operating system.