Shut down with other users logged in

When I want to shut down the computer while other users are logged in, I first have to log each one off.
How can I override this, ie have it so they get logged off automatically when shutting down?
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I don't know if this will work for an apple based computer or not, but you can try to manage the computer using a windows box.

Start > Run > MMC
File > Add/remove snap-in > Click the Add button > add Computer Management snap-in.

Connect to the destination machine.  You can do this at any time by using the MMC window, expand Computer Management snap-in, right click computer management and click "connect to another computer...".

Type in the name or IP of the computer and click OK.  Once connected to the computer, expand computer management once more, right click on computer management and select Properties.  Click the Advanced tab.  Click Settings within Startup and Recovery.  Click the Shut Down button.  Click the desired action and select "Always (could lose data)".

Again, this may or may not work for the MAC OS.
Open a terminal window -> Application -> Utilities -> Terminal

at the $ prompt type the following

$sudo /bin/bash
<enter your password>
#shutdown -r now
(for reboot)
#shutdown -h now
(for halt)
#shutdown -k now
(to kick off everyone but the superuser)

instead of now you can supply a time

#man shutdown

to view full usage.

Works instantly.

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allelopathAuthor Commented:
I was hoping for a way to do this in the GUI, but I guess that is not possible.
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Mac OS X

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