System Preferences - Energy Saver

The Energy Saver preferences allows you to specify settings for display, hard disk, and system sleep, as well as schedule shut downs and start ups. The settings can reduce the amount of power your computer uses when idle. These settings are especially important for PowerBook and iBook owners running off of battery power.

If you have a PowerBook or iBook you can configure the options differently for different uses. There are different options to optimize your energy settings that are standard, and you can customize these.

Additionally you can set the options for if you are running off of the power adapter or battery.


Configure Sleep options
Click the Sleep Tab to display the options

Drag the sliders to the desired time to set the computer to sleep when it has been inactive. To save even more energy you can put the hard disk to sleep when it isn’t needed.


Schedule start up and shut down
Click the Schedule Tab

To Start the computer automatically, check the box next to start up the computer and then set the options you need.

To shut the computer down at a certain time, check the box next to shut down and set the options. You may also just put the computer to sleep instead of shut down.


Set Energy Saver Options
Click the options tab

Wake when the modem detects a ring wakes the computer from sleep when the modem detects an incoming call
Wake for Ethernet network administrator access wakes the computer from sleep when it detects a Wake-on-LAN packet
Allow power button to sleep the computer puts the computer to sleep when you press the power button. (This option may or may not be there depending on your computer)
Restart automatically after a power failure automatically restarts the computer when power is restored after a power failure. This is useful if your computer is running as a server.