While using your Mac, you might find yourself accidentally triggering the Hot Corner actions you’ve assigned. This is frustrating, particularly as it’s easy to forget you have Hot Corners activated. Thankfully, there is a workaround that uses one or more modifier keys. This means you have to hold down one or more of several special keys before you’re able to trigger a Hot Corner’s assigned action. Without those keys held down, nothing will be triggered. The following two steps will explain how to set this up.
A secret option
Adding a modifier key to a shortcut is an easily overlooked feature. In the Hot Corners panel, hold down one or more modifier keys — (Cmd, Opt, Shift, Ctrl) when choosing an action from the pop‑up menus.
Add a modifier
The symbols for the keys you’re holding will be prefixed on the actions. Keep them held and choose an action. If you hold Cmd, say, when you move the pointer to the corner, you’ll need to hold that key to trigger the action.