Magic Mouse and Trackpad gestures interfere with the game. How do I disable them?
Finger "gestures", which are used by Magic Mice and Trackpads to switch between windows and applications, can disrupt your game if used inadvertently.
To disable them, follow these instructions:
Open System Preferences ( Menu → System Preferences).
Click on Mouse or Trackpad (depending on which you are using).
Select the More Gestures tab.
Uncheck all the checkboxes.