How to Left-Click on a Mac With a Mouse
Follow these steps to set the primary clicking function to the left button on a compatible wireless or wired mouse.
Connect a wired or wireless mouse. If it’s a Bluetooth mouse, access System Preferences > Bluetooth or click the Bluetooth icon in the menu bar to find and connect your accessory. Go to System Preferences > Mouse > Primary mouse button. Select the radio button next to Left. Now your mouse will use the left position as the primary click area.
How Do You Left-Click on a Mac Without a Mouse?
Without a mouse, use your Mac’s built-in trackpad to set left-click behavior.
From the Apple menu, go to System Preferences > Trackpad. On the Point & Click tab, uncheck the box next to Tap to click. Set the amount of pressure you need to apply to register a click using the slider under Click to select Light, Medium, or Firm. The sound of the click changes according to your choice. Clicking is quietest with Light selected and produces the loudest noise with Firm. The Silent clicking option applies only to the Force Touch Trackpad settings.
How to Left-Click With a Force Touch Trackpad on a Mac
If your Mac has a Force Touch trackpad, primary or left-clicking actions take on advanced behaviors in specific programs by clicking and pressing an item. To take advantage of these tools, first ensure you’ve enabled Force Touch functionality.
Enable Force Touch Trackpad Behaviors
From System Preferences > Point & Click, select the box beside Look up & data detectors and choose Force click with one finger.
Examples of Force Touch Trackpad Functionality
Use the Force Touch trackpad to perform some of these shortcuts on your MacBook with a force left-click.
Display all active windows of an application: From the Dock, click an app to reveal the App Expose, a menu of options related to the app. Then, select Show All Windows to display all the active windows for that particular program. Look up information: In Safari or Mail, look up a word or address to get a definition from the dictionary or directions from the Maps app. Change a file name: Force-click a file name or folder to edit it. Preview a file: Force-click a file to view it using the Quick Look feature on macOS.