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  • Quick Reference How to find a MAC Address

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  1. From the Apple in the upper left hand corner, choose System Preferences System Preferences
  2. Click the Network Network icon
  3. Select Ethernet/Thunderbolt Ethernet for your Ethernet MAC or WiFi/Airport for your Wireless MAC
  4. Click on the Advanced button
  5. Click on the Hardware or Ethernet tab
  6. Your MAC address will be at the top of this window as your Ethernet ID.

See this wiki for a more detailed procedure with screenshots.