While one of the benefits of using a Mac is that you rarely have any app which goes unresponsive, there are sometimes that it will happen, and when it happens, you will need to know how to force quit them. While on Windows you must be habituated to type Ctrl+Alt+Delete, the keyboard shortcut for force quitting on Mac is a little different. The keyboard combo that you need to hit is - Cmd+Opt+Esc (command, option, and escape key). Once you hit the combo, “Force Quit Application” box will open in a floating window. Here, you can just select the app which is misbehaving and click on the Force Quit button. If the keyboard combo is a little hard for you to remember, you can use an alternate method. Click on the Apple Menu at the top left corner and you will find the Force Quit option.