Where to find your Mac address in System Settings

Your Mac address is a unique identifier for your MacBook's network connection. You can find it in System Settings under Network, and it takes about 30 seconds. Open System Settings, click Network in the sidebar, select the connection you use (Wi-Fi or Ethernet), then click Details. The Mac address appears as a string of letters and numbers next to "Wi-Fi Address" or "Ethernet Address" depending on which connection you selected.

If you use both Wi-Fi and Ethernet, each connection has its own Mac address. The one you need depends on which network you're connecting through. Most people need the Wi-Fi address since that's what their MacBook uses most of the time.

The address looks like this: a4:5e:60:c2:8f:1b. It's always 12 characters (six pairs of letters or numbers separated by colons). Write it down or take a screenshot if you need it for something like connecting to a guest network or registering your device with your internet provider.

Key Takeaways

  • Your Mac address is found in System Settings under Network, then Details, listed as "Wi-Fi Address" or "Ethernet Address".
  • Every network connection on your MacBook has its own Mac address, so check which one you actually use before writing it down.
  • The address is always 12 characters in the format aa:bb:cc:dd:ee:ff, and you may need it to connect to restricted networks or register your device.
  • You can also find your Mac address through Terminal by typing ifconfig if you prefer the command line.

Why you might need your Mac address

Routers and networks sometimes require your Mac address to let your MacBook connect. This is called MAC filtering or device registration. Your internet provider might ask for it when you set up service. Guest networks at hotels, offices, or schools often need it before you can access the internet. Some networks use it to assign the same IP address to your MacBook every time you connect.

If you're troubleshooting a connection problem, tech support might ask for your Mac address to see what's happening on their end. It's also useful if you're setting up a new router and want to make sure your MacBook connects to the right one.

Finding it through Terminal if System Settings doesn't work

If you're comfortable using Terminal, you can find your Mac address there too. Open Terminal (search for it in Spotlight or find it in Applications > Utilities), then type ifconfig and press Enter. Look for the line that says "ether" — that's your Mac address. You'll see one for each network connection your MacBook has.

This method shows more detail than System Settings and can be useful if you're trying to troubleshoot network issues or if you need information about multiple connections at once. Most people don't need to use Terminal for this, but it's there if you prefer it.

Difference between Mac address and IP address

Your Mac address and your IP address are not the same thing, even though they both identify your MacBook on a network. Your Mac address is permanent and built into your network hardware — it never changes. Your IP address is assigned by your router or internet provider and can change every time you reconnect or move to a different network.

Think of it this way: your Mac address is like your car's VIN (vehicle identification number), and your IP address is like your home address. The VIN stays with the car forever. Your home address changes if you move. Networks use Mac addresses to identify devices on the same local network, and IP addresses to route information across the internet.

What to do if you can't find your Mac address

If System Settings shows "Not Available" or you don't see an address listed, your network connection might not be active. Make sure Wi-Fi is turned on or that your Ethernet cable is plugged in. Wait a few seconds for the connection to establish, then check again.

If you're still not seeing it, restart your MacBook and try again. If the problem continues, your network hardware might need attention — try restarting your router or contacting your internet provider. In most cases, waiting a few seconds and checking again solves the problem.

Changing your Mac address (spoofing)

Some networks block devices by Mac address, and you might want to change yours temporarily to test something or work around a restriction. This is called Mac spoofing. You can do it through Terminal, but it only lasts until you restart your MacBook — the real address comes back automatically.

If you need to change your Mac address, open Terminal and use the command sudo ifconfig en0 ether aa:bb:cc:dd:ee:ff (replace en0 with your connection and the letters with the address you want). This requires your admin password. Most people never need to do this, and some networks actively prevent it, so check whether it's allowed before trying.

Frequently Asked Questions

Can someone use my Mac address to hack my MacBook?

Your Mac address alone is not enough to hack your MacBook — it only works on your local network. Someone would need to be on the same Wi-Fi network as you and would still need your password or other security information. Treat it like you would your phone number: it's not secret, but it's not a security risk by itself.

Will my Mac address change if I update macOS?

No. Your Mac address is tied to your network hardware, not your operating system. It stays the same through updates, backups, and restores. The only way it changes is if you physically replace your network card, which almost never happens on a MacBook.

Do I need a different Mac address for Wi-Fi and Ethernet?

Yes. Your MacBook assigns a different Mac address to each connection type. If you use both Wi-Fi and Ethernet, you have two separate addresses. Check which network you're actually using before you give your Mac address to someone — they need the one for the connection you'll be on.

What if a network says my Mac address is already registered?

This usually means another device on that network is using the same Mac address, which is rare but can happen. Try restarting your MacBook and reconnecting. If it keeps happening, contact the network administrator — they may need to remove the old registration or check for a duplicate device.