How do you get to system preferences on iMac has a?

To access System Preferences on an iMac, click on the Apple logo in the top-left corner of the screen. From the dropdown menu, select "System Preferences." Alternatively, you can also find the System Preferences icon in the Dock or use Spotlight by pressing Command (⌘) + Space and typing "System Preferences." This will open the settings where you can adjust various system settings and preferences.