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Chapter 1.  Getting Started with Mac OS ... > Putting the Mac to Sleep and Waking ...

Putting the Mac to Sleep and Waking It Up

The Sleep feature enables your Mac to conserve power when it’s not in use. After a designated time of inactivity (which you can adjust in Mac OS X Version 10.2 System Preferences, as described in Chapter 10, “Changing Essential System Preferences”), the hard disk and monitor will go into the power- or battery-conserving sleep mode. Sleep mode also helps extend the life of flat panel displays. You also can put the system to sleep at will, such as when you need to be away from your desk for a designated period of time. Using sleep mode creates less wear and tear on the system than repetitively turning the system off and on. That’s because sleep mode keeps a small supply of power flowing to system components, so that they stay warm and can ramp up more smoothly when the system leaves sleep mode. In contrast, starting the system zaps a higher amount of electricity to the system all at once, taxing the components.




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