How to Set Sleep Options in Mac OS X Lion

You can make Mac OS X Lion more energy efficient by configuring parts of your Mac to go into sleep mode automatically when you are not using them.

Sleep mode means that your display or your Mac is in a temporary low-power mode. This saves energy on all Macs, and also saves battery power on a notebook Mac. For example, you can set up Mac OS X to put the display to sleep automatically after a period of inactivity. Similarly, you can configure Mac OS X to put your entire Mac to sleep after you have not used it for a specified amount of time.

To access your Mac’s sleep options:

  1. Open the Energy Saver Preferences.

    Open System Preferences.

  2. Click Energy Saver.

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    The Energy Saver preferences appear.

From here, to set sleep options for a desktop Mac:

  1. Click and drag the slider to set the computer sleep timer.

    This specifies the period of inactivity after which your computer goes to sleep.

  2. Click and drag the slider to set the display sleep timer.

    This specifies the period of inactivity after which your display goes to sleep.

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To set sleep options for a notebook Mac, after opening the Energy Saver Preferences:

  1. Click Battery.

  2. Click and drag the slider to set the computer sleep timer for when your Mac is on battery power.

  3. Click and drag the slider to set the display sleep timer for when your Mac is on battery power.

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  4. Click Power Adapter.

  5. Click and drag the slider to set the computer sleep timer for when your Mac is plugged in.

  6. Click and drag the slider to set the display sleep timer for when your Mac is plugged in.

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If your Mac’s display is in sleep mode, you can wake up the display by moving your mouse. If your entire Mac is in sleep mode, you can wake up the computer by clicking the mouse. You can also wake up the display or your entire Mac by pressing a key such as Command, Control (Ctrl), Option, or Shift on your keyboard.