Change Your Account Name in System Settings

To change the name associated with your MacBook Air account, open System Settings (or System Preferences on older versions), then navigate to General > About. You will see your computer name listed there — this is the name that appears in Finder and on your network. Click Edit next to the computer name field, type the new name, and click Done. The change takes effect when ready.

If you want to change the name of your user account itself (the name that appears on the login screen and in the top-right corner of your menu bar), the process is different. Go to System Settings > General > Users & Groups (or Accounts on older macOS versions). Click the lock icon to unlock the settings, select your account from the list on the left, then right-click your account name and choose Advanced Options. Change the Full Name field to what you want, then click OK.

Some versions of macOS require you to unlock the Users & Groups pane with your administrator password before you can make changes. If you see a lock icon, click it and enter your password when prompted.

Key Takeaways

  • Your computer name (visible in Finder and on your network) is changed in System Settings > General > About by clicking Edit next to the computer name field.
  • Your user account name (visible on the login screen) is changed in System Settings > General > Users & Groups by selecting your account and using Advanced Options.
  • You need administrator access and your password to change either name on most macOS versions.
  • Changes to your computer name take effect when ready and do not require a restart.
  • Changing your account name does not affect your files, passwords, or data — only the display name changes.

The Difference Between Computer Name and Account Name

Your MacBook Air has two separate names that can cause confusion. The computer name is what your Mac is called on your network and in Finder — it is the name other devices see when you share files or connect to a network. The account name is the username associated with your login and appears on the login screen and in the menu bar.

You can change either one independently. Changing your computer name does not change your account name, and vice versa. Most people change the computer name to something descriptive like "Sarah's MacBook" so it is straightforward to identify on a network. The account name is usually left as is because changing it can affect some applications and file permissions, though it is still possible to do.

Changing Your Computer Name on Newer macOS Versions

On macOS Monterey and later, the process is straightforward. Open System Settings, click General in the sidebar, then click About. You will see your computer name at the top of the window. Click the Edit button next to it, type your new name, and click Done. The name updates when ready without requiring a restart.

Your computer name can be up to 63 characters long and can include letters, numbers, hyphens, and periods. Avoid special characters like @ or # because some network services do not recognize them. If you plan to use your Mac on a corporate network, check with your IT department before changing the name — some organizations have naming conventions you need to follow.

Changing Your Account Name on Older macOS Versions

If you are running macOS Big Sur or earlier, the Users & Groups pane is located in System Preferences rather than System Settings. Open System Preferences, click Users & Groups, then click the lock icon in the bottom-left corner and enter your administrator password. Select your account from the list on the left, right-click it, and choose Advanced Options. Change the Full Name field and click OK.

On these older versions, you may also see a Short Name field. This is your login username and is separate from your full name. Changing the short name can affect file permissions and some applications, so most people leave it unchanged and only modify the Full Name field.

What Happens to Your Files and Data When You Change Your Name

Changing your computer name or account display name does not affect your files, folders, passwords, or any data stored on your Mac. Your documents remain in the same locations, your login password stays the same, and all your applications continue to work normally. The change is purely cosmetic — it only affects how your Mac identifies itself to you and to other devices on your network.

If you change your account name (the full name, not the short name), some older applications may take a moment to recognize the change, but they will update automatically. If you change the short name (your login username), you may need to update file permissions in some cases, which is why most people avoid changing it unless absolutely necessary.

Renaming Your Mac for Network Sharing and AirDrop

Your computer name is especially important if you use AirDrop, file sharing, or connect to a local network. Other people will see your computer name when they try to send you files via AirDrop or access your shared folders. A clear, descriptive name like "Sarah's MacBook Air" makes it obvious which device is yours and prevents confusion when multiple Macs are on the same network.

If you share your Mac with other people or use it in a workplace, a descriptive computer name helps everyone identify the correct device. You can change it back at any time if you need to, so do not worry about making a permanent decision.

Frequently Asked Questions

Do I need to restart my Mac after changing its name?

No. Changes to your computer name take effect when ready. You do not need to restart your Mac or log out and back in. The new name will appear in Finder and on your network right away.

Can I change my account name without affecting my files?

Yes. Changing your account display name (full name) does not move or affect your files. They stay in the same location and remain accessible. If you change your short name (login username), file permissions may need adjustment, which is why most people only change the display name.

What if I forget my administrator password and cannot unlock Users & Groups?

You will need to use another administrator account on your Mac to make the change, or reset your password through Recovery Mode. Restart your Mac, hold Command + R to enter Recovery Mode, then use the Reset Password utility from the Utilities menu.

Can I use special characters or spaces in my computer name?

You can use spaces, letters, numbers, hyphens, and periods. Avoid special characters like @, #, !, or & because some network services do not recognize them and may cause connection problems.

Will changing my computer name affect my Wi-Fi or internet connection?

No. Your internet connection is tied to your network settings, not your computer name. Changing the name does not affect your ability to connect to Wi-Fi or access the internet.