The Apple Thunderbolt to Gigabit Ethernet Adapter lets you easily connect to a high-performance Gigabit Ethernet network
Small and compact, it connects to the Thunderbolt port on your Mac computer and provides an RJ-45 port that supports 10/100/1000BASE-T networks
System Requirements: OS X v10.7.4 or later Thunderbolt-equipped Mac computer
Compatible with MacBook Air (13-inch, Early 2015 - 2017), MacBook Air (11-inch, Early 2015), MacBook Pro (Retina, 13-inch, Late 2012 - 2015) and MacBook Pro (Retina, 15‑inch, Mid 2012 ‑ 2015)
Compatible with iMac (Retina 4K, 21.5-inch, Late 2015), iMac (Retina 5K, 27-inch, Late 2014 - 2015), Mac Pro (Late 2013) and Mac mini (Late 2014)