Can’t Change Local Hostname on Mac? 5 Best Fixes!

“Local Hostname” helps other devices on your local network identify your Mac. It’s used for several pivotal tasks such as file sharing, AirDrop, remote access, SSH connections, and other network-related services. Thankfully, macOS offers a straightforward way to change the Local Hostname through System Settings. However, at times, the new name fails to save, reverts to the previous one, or simply refuses to update due to certain reasons.

If that’s where you are staring at, wondering why your Mac’s Local Hostname is not updating, you’ve come to the right place. Keep reading to…

How to Fix Mac’s Local Hostname Not Changing

To me, this issue typically arises due to limited administrator permissions, temporary software glitches, network configuration problems, or conflicts with another device using the same hostname. By taking these culprits to task, you can resolve the problem.

1. Make Sure You’re Using an Administrator Account

It’s worth highlighting that the Local Hostname is a system-level setting. That means only administrator accounts have the authority to modify it. So, if you’re logged into a standard user account, you won’t be allowed to make any changes.

• Open System Settings > Users & Groups.
• Now, make sure to check whether your account is labeled Administrator.
• If it isn’t, be sure to sign in using an administrator account.
• After that, head over to the System Settings > General > Sharing.
• Click Edit beside the Local Hostname and enter your preferred name.
• In the end, do not forget to click OK to save the changes.

Using an administrator account ensures macOS has the required permissions to update your network identity.

2. Restart Your Mac and Try Again

Be warned that the temporary system glitches or background processes may also be playing their part, blocking the hostname changes. Restarting your Mac refreshes system services, clears temporary cache files, and often resolves minor software issues.

• To get going, navigate to the Apple menu > Restart.
• Then, wait for your Mac to reboot completely.

• Launch System Settings > General > Sharing.
• Next up, edit the Local Hostname again and hit OK to save.

A simple restart is often enough if the problem was caused by a temporary software bug.

3. Choose a Valid and Unique Local Hostname

macOS is designed to follow specific naming rules for Local Hostnames. If the name contains unsupported characters or matches another device on your network, your macOS device may either reject it or automatically modify it.

1. Open System Settings.
2. Navigate to General > Sharing.
3. Click Edit next to the Local Hostname.
4. Enter a hostname using only:
   • Letters (A–Z)
   • Numbers (0–9)
   • Hyphens (-)
5. Avoid spaces, symbols, and special characters.
6. Try a unique name if another device may already be using the same hostname.
7. Click OK.

Using a properly formatted and unique hostname reduces conflicts and allows macOS to register the name successfully.

4. Change the Local Hostname Using Terminal

If the graphical interface isn’t saving your changes, Terminal can directly update the system’s hostname. This method bypasses potential issues with the Settings app.

1. Open Terminal from Applications > Utilities.
2. Enter the following command:

sudo scutil --set LocalHostName YourNewName

Replace YourNewName with your preferred hostname.

3. Press Return.
4. Enter your administrator password when prompted.
5. Press Return again.
6. Restart your Mac.
7. Open System Settings > General > Sharing to verify the new hostname.

This command updates the Local Hostname directly in macOS system settings and often succeeds when the graphical interface fails.

5. Update macOS

Occasionally, bugs in macOS can prevent network settings from being saved correctly. Installing the latest software updates may resolve known issues and improve overall system stability.

• Open System Settings > General > Software Update.
• Wait for your Mac to check for updates.

• If an update is available, click Update Now or Upgrade Now.
• Follow the on-screen instructions.
• After installation, restart your Mac and try changing the Local Hostname again.

Keeping macOS up to date ensures you have the latest bug fixes and compatibility improvements released by Apple.

Signing off…

And that’s about it! If your Mac won’t let you change its Local Hostname, the problem is usually related to permissions, temporary software glitches, invalid hostname formatting, or outdated system software. In most cases, restarting your Mac, using an administrator account, or assigning a valid hostname resolves the issue quickly.

If the Settings app continues to misbehave, using the Terminal command provides a reliable alternative for updating the Local Hostname. Once the change is successfully applied, your Mac should appear with the new name across your local network, making it easier to identify when using features like file sharing, AirDrop, Screen Sharing, or remote access.