Apple iMac (21.5-inch, Late 2011) - Manual (Page 41)

41 Chapter 4 Problem, Meet Solution
An Ounce of Prevention
If you have a problem with your computer or software, having kept up-to-date Time
Machine backups ensures that your data won’t be lost. If you make regular Time
Machine backups, you can restore your software and all your data to exactly the way it
was at the time of backup. Even serious issues are of less concern when you safeguard
your information with Time Machine.
Problems That Prevent You from Using Your iMac
If your iMac won’t respond or the pointer won’t move
 Make sure the mouse and keyboard are connected. Unplug and then plug in the
connectors and make sure they are secure.
 Try to force problem applications to quit. Hold down the Option and Command (x)
keys and press the Esc key. If a dialog appears, select the application and click Force
Quit. Then restart your iMac to be sure the problem is entirely cleared up.
 If you’re unable to force the application to quit, hold down the power button (®) on
the back of your iMac for five seconds to shut down the computer.
 Unplug the power cord from your iMac. Then plug the power cord back in and press
the power button (®) on your iMac to turn it on.
If the problem reoccurs when you use a particular application, check with the
application’s manufacturer to see if the application is compatible with your iMac.