Follow these steps to change the Apache port in Promise Utility on a Mac system:

1. Launch Promise Utility
- Open the Mac System Menu and navigate to Go > Applications.
- Locate and launch Promise Utility.

 2. Access Preferences
- In Promise Utility, go to Settings.

3. Unlock General Tab
- Double-click the lock icon in the General tab.

4. Authenticate User
- Enter your Mac system username and password when prompted.

5. Change the Port
- Locate the Promise Utility Port field.
- Enter the new port number and click the Apply button.

6. Restart Promise Utility
- Close Promise Utility.
- Relaunch the application to apply the changes.

Your Apache port has now been successfully updated in Promise Utility.