System Preferences on your Mac
System Preferences is the place where you personalize your MacBook Air settings. For example, use Energy Saver preferences to change sleep settings. Or use Desktop & Screen Saver preferences to add a desktop picture or choose a screen saver.
Customize your MacBook Air. Click the System Preferences icon in the Dock, or choose Apple menu
> System Preferences. Then click the type of preference you want to set. To learn more, see Customize your Mac with System Preferences in the macOS User Guide.
![The System Preferences window](https://help.apple.com/assets/5DC5C65E0946229278B1E3AD/5DC5C6730946229278B1E3EF/en_US/f9f5bd6de45da40d09a9096ee3b56b0b.png)
Update macOS. In System Preferences, click Software Update to see if your Mac is running the latest version of macOS software. You can specify options for automatic software updates.