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. The USB 3.0 to Gigabit Ethernet Adapter UE300 adds Gigabit Ethernet network connectivity to your Ultrabook MacBook Air or desktop through a USB 3.0 port. Backward compatible with USB 2.0/1.1 standards transferring files at ultrafast speed over an Ethernet port. Fastest USB 3.0 and Gigabit solution ensure high speed transfer rate Plug and Play in Windows (XP/Vista/7/8/8.1) Mac OS X (10.9/10.10) Linux OS. Note Driver required for Mac OS X (10.5-10.8) Foldable and Portable design ideally suits your Ultrabook