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In Apple macOS the computer can be shut down by choosing "Shut Down…" from the Apple Menu, by pressing Control+Power key/button (or Media Eject key), or by pressing the power key to bring up the power management dialog box and selecting button "Shut down". An administrator may also use the Unix shutdown command as well. [7]
The power key, or power button, is a key found on many computer keyboards during the 1980s and into the early 2000s. They were introduced on the first Apple Desktop Bus keyboards in the 1980s and have been a standard feature of many Macintosh keyboards since then.
IEC 60417-5007, [6] the power-on symbol (line), appearing on a button or one end of a toggle switch indicates that the control places the equipment into a fully powered state. (1 or | means on.) IEC 60417-5008, [7] the power-off symbol (circle) on a button or toggle, indicates that using the control will disconnect power to the device. (0 or ...
The following example sets a one-time scheduled power event. The machine will be set to shut down 01/10/2009 at 10:00 PM (10 January 2009 – Note the US centric MM/DD/YYY time syntax). Only privileged users can issue this command. If the command is issued successfully and is without syntax errors, pmset will exit silently with an exit code of 0.
Obviously, the state that uses the least amount of power is a full shutdown, followed closely by “hibernate”—and trailed significantly by “sleep,” which uses the most power.
To decide what to do when the computer's on/off button is pressed, such as whether to shut down or to enter standby. Whether to allow Hibernation (some systems become unstable when restarting). Allows the user to configure UPS (if available). Since Windows Vista, additional hidden power options are available for fine tuning power features.
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⊞ Win+I opens Settings charm, where app-specific settings, network options and shutdown button is located. ⊞ Win+X opens Quick Links menu [10] and grants access to several frequently used features of Windows, such as accessing desktop or File Explorer. [11] With Windows 8.1 update, it includes a shortcut to shut down or restart the computer.