OS X: How to Adjust Settings on a Mac?
Adjusting your settings
At some point, you may want to adjust your computer’s settings. For example, you might want to change your desktop background or modify your Internet settings. You can change most of your computer’s settings from System Preferences.
To open System Preferences:
Click the Apple icon in the top-left corner of the screen, then select System Preferences.
The System Preferences window will appear. Simply click the desired setting to adjust it.
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