125. Choose a Power-Saving ProfileSEE ALSO 126Monitor Your Laptop's Battery Life 43 Create and Configure a Location If your Mac is a laptop, you will have a variety of different conditions under which you can run it: You might run it off of battery power on an airplane while you watch a DVD, or you might have it plugged into wall power while you play a graphics- intensive game, or you might be stuck in a long meeting taking notes for the whole two- hour duration. Each of these activities places different kinds of demands on the computer and its components , and each scenario is affected by what kind of power is available. NOTE If your Mac is a desktop modelan iMac, eMac, or Power Macthe Energy Saver Preferences pane does not show the power-saving profile options described in this task. This is because desktop Macs only have a single power source: the wall plug. If your desktop Mac is asleep, don't unplug iteven sleep mode requires some power! Laptops get their power during sleep from the battery. To shut down your desktop Mac, first awaken it from sleep, and then shut it down using the Apple menu. 125. Choose a Power-Saving Profile The Energy Saver Preferences pane lets you select from several usage profiles that correspond to different styles of how you stress the computer and use its available power. Some profiles are designed for high performance; others are designed for long battery life; still others provide a balance between performance and battery life for specific uses. You can also define your own custom- tuned power usage profile if necessary.
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