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System Preferences on your Mac
System Preferences is where you personalize your iMac settings. For example, use Energy Saver preferences to change sleep settings. Or use Desktop & Screen Saver preferences to add a desktop background or choose a screen saver.
Customize your iMac. 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/60BDB5E39A4D7B1DFE5790D3/60BDCF7C0D78B904D55D75DA/en_US/73122e94bbecadbf91332240c25f38b2.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.