How to Swipe Between Apps on a Mac

Enabling the Gesture

1. 
   Click the Apple menu.
2. 
   Click System Preferences. Click Show All at the top of the window if you don't see the main System Preferences options.
3. 
   Click the Trackpad or Mouse option. Choose Trackpad if you're using a MacBook or a Magic Trackpad. Click Mouse if you're using a Magic Mouse.
4. 
   Click the More Gestures tab.
5. 
   Check the Swipe between full-screen apps box. The number of fingers the gesture uses will be displayed below.
6. 
   Click the menu underneath. If you're using a trackpad, you can change the number of fingers the gesture uses.
7. 
   Click the number of fingers you want to use. You can switch between three fingers or four fingers for the gesture.^[1]