This is easy to remember but not necessarily the most powerful method, since sometimes an application is completely unresponsive and the menus are inaccessible. Hold the Shift Key and click on the  Apple menu to find “Force Quit ”. Option + Right Click on an apps icon in the Dock to bring up the “Force Quit” option, selecting this will kill the app without any confirmation. This is not well known, but offers perhaps the quickest way to force quit the foreground application in Mac OS X and a very good keyboard shortcut to remember. Be sure to do this while the app you want to force quit is the foremost application on the Mac, as it will force quit whatever is active when held down. Hold down Command+Option+Shift+Escape for a second or two until the app forcibly closes. 2) Force Quit Currently Active Mac App with the Keyboard That Force Quit keyboard shortcut is probably the best combination of easy and power when force quitting apps in Mac OS X, since you can access it with a keystroke, select and force quit multiple apps if necessary, and summon it from anywhere. If you’re going to remember nothing else for force quitting apps in Mac OS X, remember this keystroke: Command + Option + Escape Think of this as a simplified version of Activity Monitor, and it’s also a great keystroke to remember to use since it allows for quickly ceasing multiple apps. Starting with one of the best and easiest is the system wide Force Quit function: Hit Command+Option+Escape from anywhere to bring up the simple “Force Quit Applications” window, then click on the app name to select, followed by clicking the “Force Quit” button, this will end the app immediately. 1) Use a Keyboard Shortcut for “Force Quit Applications” on Mac

And yes, these tricks work in all versions of Mac OS and Mac OS X. Take a moment to review the tricks below, and then remember a few keyboard shortcuts or sequences now to save yourself a hassle later if you find yourself in a situation where you need to force quit a Mac app.

How to Force Quit Mac Apps: 7 Different Ways

How to force close on mac