This article explains how to left-click on a Mac using a mouse or the built-in trackpad. The instructions apply to Macs running macOS Big Sur (11.0), macOS Catalina (10.15), and macOS Mojave (10.14).
MacBook How to Right Click
Follow these steps to set the primary click function for the left button on a compatible wireless or wired mouse.
Connect a wired or wireless mouse. If it's a Bluetooth mouse, go to 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.
