Compatible with most Thunderbolt-equipped Mac computers Featuring an OS X v10.7.4 or later operating system for wide-ranging use. Connects to a high-performance Gigabit Ethernet network Through your Mac's Thunderbolt port. Integrated RJ-45 Ethernet port supports 10/100/1000Base-T networks. Built-in Thunderbolt cable Offers simple setup. Compact design Allows easy portability. Apple, PowerBook, AirPort, FireWire, QuickTime, iTunes and Mac OS are trademarks of Apple Computer, Inc., registered in the U.S. and other countries. Velocity Engine, SuperDrive and iLife are trademarks of Apple Computer, Inc.