how to force to shutdown a Mac computer

[guest]

If you’re unable to force the application to quit by following this post: How to force to close an application in Mac OS - http://www.chicagotech.net/netforums/vi ... =9&t=15468
hold down the power button (®) for five seconds to shut down the computer. Unplug the power cord from your Mac. Then plug the power cord back in and press the power button (®) to turn it on.