Pro Tip: The equivalent of Ctrl + Alt + Delete on Mac

Do you have an unresponsive program that you need to force quit? On a Mac, pressing Command + Option + Escape is equivalent to pressing Control + Alt + Delete on a PC.

So, should you find yourself unable to exit a program, hold down the Cmd + Option keys and press Esc. This will bring up the Force Quit Applications dialog box, which will display all running applications and allow you to terminate any of them.