The WD My Passport for Mac Portable Hard Drive features palm sized portability, which makes it an efficient storage solution for people on the go. The device is formatted for use with MAC OS X, and it works great paired with Apple’s Time Machine and password protection software. Featuring 1TB of storage capacity, My Passport for Mac can store massive amounts of music, photos, videos and more. The My Passport hard drive is quick and easy to use. Just remove it from the box and plug its USB connection into your Mac.