What a Mac address is and why you need it

Your Mac address is a unique identifier assigned to your MacBook's network hardware — not your computer itself, but the physical network card inside it. It looks like six pairs of numbers and letters separated by colons, such as a4:5e:60:d1:2c:8f. Your internet provider, your router, or a network administrator may ask for it when you connect a device to their network, troubleshoot a connection problem, or set up a new device on a shared WiFi.

The name "Mac" stands for Media Access Control and has nothing to do with Apple or macOS — it is a standard used across all devices with network hardware, from iPhones to printers to Windows computers. Every network device has one. Your MacBook actually has multiple Mac addresses if it has both WiFi and Ethernet, because each connection type has its own hardware identifier.

Key Takeaways

  • Your MacBook has a separate Mac address for WiFi and for Ethernet, and you may need to find the one that matches how you are connected.
  • The fastest way to find your WiFi Mac address is through System Settings under Network, which takes about 30 seconds.
  • You can also find it by holding Option and clicking the WiFi icon in the menu bar, which shows the address without opening any windows.
  • If you need the Ethernet Mac address, it appears in the same System Settings location but under a different network interface name.
  • Write down or screenshot the address exactly as shown — a single wrong character will cause connection problems.

Finding your WiFi Mac address through System Settings

Open System Settings by clicking the Apple menu in the top-left corner and selecting System Settings. On the left sidebar, click Network. You will see a list of network types — click WiFi on the left side.

On the right side of the window, you will see your WiFi network name and connection status. Click the Details button. A new window opens showing detailed information about your connection. Look for the field labeled MAC Address — the address appears directly below it. This is the identifier your network needs.

If you are on an older MacBook running an earlier version of macOS, the path may be slightly different: go to System Preferences instead of System Settings, then Network, then WiFi, then Advanced. The Mac address field is in the same location but the window layout differs. The information you find is the same.

The faster method using the menu bar

If you do not want to open System Settings, hold down the Option key on your keyboard and click the WiFi icon in the menu bar at the top right of your screen. A dropdown menu appears showing your current WiFi network and detailed technical information about your connection.

Look for the line that says MAC Address or BSSID — the address you need appears on that line. This method is faster than opening System Settings and works the same way on all recent versions of macOS. You can take a screenshot of this menu to save the address, or write it down directly from the screen.

Finding your Ethernet Mac address

If your MacBook is connected to the internet through an Ethernet cable instead of WiFi, the process is the same but you look in a different place. Open System Settings, click Network, then click Ethernet on the left sidebar instead of WiFi. Click Details and look for the MAC Address field.

Some MacBooks do not have a built-in Ethernet port and require a USB adapter to connect an Ethernet cable. If you are using an adapter, the Mac address for that adapter appears under Ethernet in the same way. The address changes depending on which adapter you plug in, so if you switch adapters, you may need to find the new address.

What to do once you have the address

Copy the Mac address exactly as it appears — include all the colons and match uppercase and lowercase letters precisely. A single character wrong will cause your device to be rejected by the network or assigned to the wrong device. If you are typing it by hand rather than copying and pasting, read it aloud to the person who needs it to catch mistakes before you submit it.

Some networks ask you to register your Mac address before you can connect. Others use it only for troubleshooting if your connection drops. Your internet provider or network administrator will tell you what to do with the address once you have found it. If they ask for your "device address" or "hardware address," they are asking for the same thing as a Mac address.

Why your Mac address might look different in different places

If you look up your Mac address in multiple locations — System Settings, the menu bar, or a router's connected devices list — you might see slightly different formats. Some systems show the address with colons (a4:5e:60:d1:2c:8f), others with hyphens (a4-5e-60-d1-2c-8f), and some with no separators at all (a45e60d12c8f). These are all the same address, just displayed differently.

Your MacBook always uses the colon format in System Settings and the menu bar. If a network or service asks for a different format, you can convert it yourself by replacing the colons with hyphens or removing them entirely. The actual identifier — the sequence of characters — never changes.

Frequently Asked Questions

Can I change my Mac address?

Your Mac address is tied to your network hardware and cannot be permanently changed through normal settings. Some advanced users can temporarily spoof a Mac address for testing purposes, but this is not a standard task and requires technical knowledge. For most people, the address is fixed and unique to that piece of hardware.

Is my Mac address the same as my IP address?

No. Your Mac address identifies your physical device on a local network, while your IP address identifies your connection to the internet. Your Mac address stays the same on the same network. Your IP address can change when you move to a different network or reconnect to the same one.

Why does my router show a different Mac address than my MacBook does?

Your router may display your Mac address in a different format (hyphens instead of colons, for example) or may show a slightly different address if your MacBook is using a privacy feature that randomizes the address on certain networks. Check that the numbers and letters match even if the formatting differs.

Do I need to find my Mac address if I just want to use WiFi normally?

No. You only need your Mac address if someone specifically asks for it — a network administrator, your internet provider, or a service that requires device registration. For everyday WiFi use, you just need your network password.

What if I cannot find the Mac Address field in System Settings?

Make sure you clicked Details after selecting WiFi or Ethernet. If the Details button does not appear, try restarting System Settings or restarting your MacBook. On very old versions of macOS, the field may be labeled differently or located in System Preferences instead of System Settings.