The built-in trackpad on the MacBook and MacBook Pro functions as the main input method for Apple laptops but if you generally use an external mouse or external trackpad, you may occasionally find that the built-in trackpad receives data you would like to ignore. With a simple setup setting you can do just that, ignoring any input from the built-in trackpad when connecting a mouse or trackpad on Mac.
How to disable the built-in trackpad when the external mouse / Trackpad is connected to the MacBook
This applies to any MacBook, MacBook Air or MacBook Pro. The Mac without a built-in trackpad does not have this feature.
- From the Apple main menu go to "System Preferences" and then choose "Accessibility"
- Select "Mouse and Trackpad" in the interaction section on the left
- Check the box next to "Ignore the built-in trackpad when the mouse or wireless trackpad is present"