To keep your Mac up to date with the latest version of macOS, you can use the built-in Software Update feature.
To use Software Update:
1. Go to the Apple menu in the top left corner of your screen.
2. Select “System Preferences” from the drop-down menu.
3. Click “Software Update”.
4. If there are any available updates, click “Install Now” to begin the update process.
5. Follow the on-screen instructions to complete the update.