Here’s how to check the Mac ethernet hardware address (MAC address):
- Open System Preferences from Apple menu
- Select Network from View menu
- Select Ethernet from the list of adapters (WiFi for OS 10.7 Lion)
- Connection types include WiFi, Airport, Ethernet, and Built-in Ethernet.
- Select Advanced
- Select Ethernet or Airport tab (Hardware for OS 10.7 Lion)
Note: the hardware address is the 12 hex characters (letters and numbers) next to MAC Address:, Ethernet ID:, or AirPort ID:.
Why Do You Need the MAC Address?
The MAC address is basically a serial number for your network adapter. As you can imagine by the term serial number, this is useful for identifying and controlling devices on a network.
Devices can be controlled with MAC addresses by assigning a static IP address, filtering by the MAC address, and even force time limitations on wireless access.
Finding MAC Address from Terminal
- Open Terminal from the Applications:Utilities folder.
ifconfigand press the Return key.
- From the information provided about your interfaces, look for the 12 hex character MAC address for the interface you’re using, probably en0. Likely labeled as ether.
Update: here’s a good article from HowToGeek on How to change your MAC address.
Related Mac Network Articles
That’s a couple of ways to check MAC ethernet hardware addresses. Which one is your favorite or do you use a different method or tool entirely?