Program freezing and want to close it? Try Alt-F4 (Windows) Command-W (or Q) on a Mac
If you would like to close out a program you are running on your Windows machine, try using Alt-F4. The equivalent on a Mac is Command-W. But that only closes the open window, not the entire app. If you need to close the entire app, you hit Command-Q. Embedded below is a GIF followed by a second YouTube tutorial.