How-to: Find MAC Address on OS-X

Find your MAC address on OS-XIf you travel around a lot, as I do, then you’ll often find the more secure locations with computer networks want to know the MAC address of any mobile devices you want to attach to their networks.

The MAC address is one way for wireless networks to restrict access to only those devices they can identify. You’ll need to give your MAC Address to the network manager to add your device to the list of registered devices so that you can use the network.

We don’t really cover things-Macintosh here, but since we had a request, here’s how to find your Mac’s MAC address on OS-X. AJS

MAC Address numbers should be unique thanks to it’s length in hexadecimal notation and the MAC Address is difficult to fake. The MAC Address is 12 digits long, broken up into pairs: 12:34:56:78:9A:BC. It’s a base-16 value (hence called hexadecimal), so the letters A through F are treated as numeric values.

Apple Mac OS X (Tiger)

  • From the Apple in the upper left hand corner choose System Preferences
  • Click on the Network icon
  • From the Show menu Select Airport (for Wireless) or Built in Ethernet (for Wired)
  • For the Built in Ethernet (for Wired) the MAC address will be at the top of the Ethernet tab as the Ethernet ID. The MAC address is the 12 character address similar to 00:11:22:AA:66:DD
  • For the Airport (for Wireless) the MAC address will be at the top of the AirPort tab as the AirPort ID (or on the TCP/IP tab, again as the AirPort ID ). The MAC address is the 12 character address similar to 00:14:67:F0:56:A4
  • To find your Computer Name go back to System Preferences and click on Sharing , your computer’s name should be in the computer name box at the top of this window.

Apple Mac OS X (Snow Leopard/Leopard)

  • From the Apple in the upper left hand corner choose System Preferences
  • Click on the Network icon
  • Select Ethernet for Wired or Airport for Wireless
  • Click on the Advanced button
  • Click on the Ethernet tab
  • Your MAC address will be at the top of this window as your Ethernet ID . The MAC address is the 12 character address similar to 00:11:22:AA:66:DD

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