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acwake (laptop only) wake the machine when the power source is changed, such as when AC power is removed and the machine switches to battery power, 1 to enable or 0 to disable lessbright (laptop only) slightly turn down display brightness when switching to a specified power source, 1 to enable or 0 to disable
1. Click the Apple menu, and then click Shut Down. Note: Wait for 20 seconds, and then turn on the computer. 2. On the keyboard, hold down the Command and Option keys, and then tap the esc key. In the Force Quit Applications window, click any program other than Finder to highlight it, and then click Force Quit. 3.
Machine state is held in RAM and, when placed in sleep mode, the computer cuts power to unneeded subsystems and places the RAM into a minimum power state, just sufficient to retain its data. Because of the large power saving, most laptops automatically enter this mode when the computer is running on batteries and the lid is closed.
After hibernating, the hardware is powered down like a regular shutdown. [4] The system can have a total loss of power for an indefinite length of time and then resume to the original state. Hibernation is mostly used in laptops, which have limited battery power available. [4] It can be set to happen automatically on a low battery alarm.
Here’s some outdated info we’ve likely all heard before: Many of us were told decades ago that while a shut-down computer uses almost no power, in the long run it uses more because turning it ...
To shut down or power off a computer is to remove power from a computer's main components in a controlled way. After a computer is shut down, main components such as CPUs , RAM modules and hard disk drives are powered down, although some internal components, such as an internal clock, may retain power.
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