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11: System Preferences - Energy Saver

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

You can configure the options differently on your Apple laptop 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 when you are running off of the power adapter or battery.

To 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 prevent your computer from going to hard sleep, where you may not be able to wake up the computer, uncheck the box "Put the hard disk(s) to sleep when possible".

To 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.

To 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
Automatically reduce the brightness of the display before display sleepwill dim your display right before it goes to sleep.
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.
Show battery status in the menu bar will place a battery icon in the menu bar at the top-right corner of your screen.

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11: System Preferences - Energy Saver

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