Open box, will come repackaged but like new otherwise

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From the manufacturer:
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About this item

  • The Apple Thunderbolt to Gigabit Ethernet Adapter lets you easily connect to a high-performance Gigabit Ethernet network.
  • Thunderbolt-equipped Mac computer
  • Supports 10/100/1000BASE-T networks.
  • System requirement:OS X v10.7.4 or later


Connector TypeEthernet, Thunderbolt
BrandApple
Warranty TypeLimited
Number of Ports2
Compatible DevicesMacBook Air (13-inch, Early 2015 - 2017), MacBook Air (11-inch, Early 2015), MacBook Pro (Retina, 13-inch, Late 2012 - 2015), MacBook Pro (Retina, 15-inch, Mid 2012 - 2015), iMac (Retina 4K, 21.5-inch, Late 2015), iMac (Retina 5K, 27-inch, Late 2014 - 2015), Mac mini (Late 2014), Mac Pro (Late 2013)MacBook Air (13-inch, Early 2015 - 2017), MacBook Air (11-inch, Early 2015), MacBook Pro (Retina, 13-inch, Late 2012 - 2015), MacBook Pro (Retina, 15-inch, Mid 2012 - 2015), iMac (Retina 4K, 21.5-inch, Late 2015), iMac (Retina 5K, 27-inch, Late 2014 - 2015), Mac mini (Late 2014), Mac Pro (Late 2013)