Force+quitting

How do I trouble-shoot a non-responsive computer?
If an application freezes, you should force quit that application (**cmd+option+esc** or **opt+right click** the application icon in the dock). Typically, this will solve the problem.

If the system becomes sluggish, restarting the computer should fix the problem (cmd+opt+Q).

As a last resort, you can force a shut down by holding down the power button for 10 seconds. Wait another 10 seconds before starting the computer again.

Note: If a CD or DVD gets stuck in the drive and refuses to eject, restart the computer and keep the mouse button held down until you see the login screen.