How to Enable Right Click on an Apple Mouse

Make sure your wired Apple mouse is plugged into a USB port on your computer or your wireless mouse is connected via Bluetooth.
Click on the 'System Preferences' icon in the Dock.
Go to the 'Mouse' control panel in the Hardware section.
Open the drop-down menu on the right side of the window. The menu will be set to 'Primary Button' by default.
Change the drop-down menu setting to the 'Secondary Button' option. This will instruct the system to recognize right-clicks.
Close the System Preferences window to save the settings. Now when you press on the right side of your mouse's surface, the computer will treat it like a right-click.
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