Finding your hardware address: Mac OS X

You must register your computer's hardware address(es) before your computer can communicate over SUNet. Note that laptops with wireless capabilities will have TWO hardware addresses, one for the wired connection, and one for the wireless connection.

1. Use Spotlight (a system-wide search tool) to find the Network Utility application.  To open Spotlight, click on the magnifying glass icon in the upper-right corner of your screen and type "Network Utility".  hit ENTER to confirm the first result and open it.
2. Click the Info tab at the top of the window, and from the displayed dropdown select the network interface (WiFi or Ethernet/Wired) for which you want the hardware address.  The hardware address will be listed below.
3. Note that for Macs without Ethernet ports (any laptop with a Retina display, or equivalently without a CD drive), if you would like to register your device for wired network access, you must first get an Ethernet adapter for your computer and plug it in before registering.  This is because the hardware address is actually tied to the adapter, so you will only be able to view your Ethernet hardware address with the adapter plugged in.