Works on my MacBook Pro (Retina 15" Mid 2015) with OS X High Sierra 10.13 (17A365). I had to download and install the software from the J5create website. (sorry Revain won't let me post a link here) After installing (and rebooting) I also had to go to System Preferences > Security & Privacy and let the new 'extension' work. Immediately afterwards, the device appeared in my network settings as a connection option. It can also be used with Windows virtual machines in Parallels Desktop v11.2.3. USB 3.0 or Gigabit Ethernet expansion requires no additional power supply. ) to be installed. I prefer plug and play whenever possible.
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