The award winning Kanex Thunderbolt to Gigabit Ethernet + USB 3.0 Adapter lets you easily connect to a reliable, high-speed Gigabit Ethernet network. Small and compact, it connects to the Thunderbolt port on your Mac or PC computer and provides an RJ-45 port as well as an extra SuperSpeed USB 3.0 port. Compatible with MacBook with MacBook Air (11-inch, Mid 2011), MacBook Air (13-inch, Mid 2011), MacBook Pro (13-inch, Late 2011), MacBook Pro (13-inch, Early 2011), MacBook Pro (15-inch, Late 2011), MacBook Pro (15-inch, Early 2011), MacBook Pro (17-inch, Late 2011), MacBook Pro (17-inch, Early 2011), iMac with Thunderbolt (No USB 3.0), iMac (27-inch, Mid 2011), iMac (21.5-inch, Mid 2011), Apple Thunderbolt Display (No USB 3.0 - 27-inch) Mac mini with Thunderbolt (No USB 3.0 - Mac mini (Mid 2011). New Mac computers beyond 2011 have USB 3.0 built in already, but this product can still be used to expand your needs. It is simple, portable and easy to use.