or How I learned to kill my badly behaving OS X apps.
This question comes up a lot so I thought it was worth a dedicated post. On Windows, when an application is in a hung state and your system becomes unresponsive you can press Ctrl + Alt + Del to open the task manager. There is an equivalent key sequence on OS X.
If you have a hung application pressing Alt+Cmd+Esc will bring up a list of running applications with a button to allow you to Force Quit the application. Select the application you want to close and click Force Quit should kill the offending applications. You can also access this dialog by clicking the Apple menu and choosing Force Quit.
That’s it pretty simple. Hopefully the Mac applications you have behave so well you never have to do this.