- Introduction
- Understanding System Preferences
- Viewing System Preferences
- Locking and Unlocking Preference Settings
- Changing Appearance Options
- Setting Up the Desktop
- Setting Up Screen Savers
- Setting the Date and Time
- Changing Language Options
- Changing Text Substitution Options
- Saving Energy and Managing Power
- Selecting a Startup Disk
- Changing the Way a CD or DVD Starts
- Controlling Sound
- Dictating Your Speech
- Letting Mac Do the Talking
- Setting Accessibility Options
- Having VoiceOver Read from the Screen
- Setting VoiceOver Preferences
- Using VoiceOver Commands
- Setting Ink Preferences
This chapter is from the book
This chapter is from the book
This chapter is from the book
Saving Energy and Managing Power
When you’re not using your computer, you can save energy by putting it to sleep. When you put your computer to sleep, the power mode is set to low and the screen goes black to save energy. Your computer is still running, so it takes less time for it to wake up. While your computer sleeps, you can use Power Nap (New!), if your Mac supports it, when AC plugged in or batter powered to download OS X and app updates and perform Time Machine backups to Time Capsule, so your computer is always up-to-date. You can use the Sleep command on the Apple menu to put your computer right to sleep, or you can put your computer and display to sleep automatically when it has been idle for a specific amount of time or when you schedule it at a regular time interval. You can also set the hard disk to sleep whenever possible to save more energy. If you have a Mac laptop, such as a MacBook, it automatically goes to sleep when you close the lid. You move your mouse or press a key to wake it up. If a security option is set in System Preferences, your computer requires a password when it wakes from a sleep.
Set Sleep Options
Click the System Preferences icon in the Dock, and then click the Energy Saver icon.
To enable or disable Power Nap (New!), click Battery or Power Adapter, and then select or clear the Enable Power Nap while on batter power or Enable Power Nap while plugged into a power adapter check box.
Drag the slider to set a time interval for Computer sleep and Display sleep.
To conserve energy, select the Put the hard disk(s) to sleep when possible check box.
Click the Close button.
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Set a Sleep, Startup, or Shut Down Schedule
- Click the System Preferences icon in the Dock, and then click the Energy Saver icon.
- Click Schedule, and then click Details, if necessary.
- Select or clear the Start up or waker check box. If so, select an interval from the pop-up, and then set a time.
- Select or clear the bottom check box. If so, select an operation from the first pop-up menu, select an interval from the second pop-up, and then set a time.
- Click OK, and then click the Close button.
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Set Wake and Power Failure Restart Options
- Click the System Preferences icon in the Dock, and then click the Energy Saver icon.
- Select or clear the Wake for Ethernet network access check box.
- Select or clear the Allow power button to sleep the computer check box.
- Select or clear the Start automatically after a power failure check box.
- Click the Close button.
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