To force quit on a frozen Mac, press Command + Option + Escape keys together. Select the unresponsive app from the Force Quit window, then click Force Quit to close it immediately and regain control.
To force quit on a frozen Mac, press Command (⌘) + Option + Esc. This opens the Force Quit Applications window. Select the unresponsive app and click Force Quit. Alternatively, you can right-click the app in the Dock and choose Force Quit.