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8
Part I: Getting Started with Mac OS X 10.7 Lion
Caution
If you cut the power to a Mac without first switching it off (either by pulling the plug or by removing the bat-
tery from a MacBook), you risk damaging the files on your Mac. Although this damage may not be immediately
noticeable, an accumulation of damage could eventually cause problems, such as applications no longer work-
ing correctly or files missing data. Always shut down before disconnecting the power source.
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Logging out of Mac OS X
You can log out of Mac OS X when you have finished using your computer. This provides an
additional level of security over putting the Mac to sleep because it requires people to enter a
password before they can begin using the computer. Logging out of Mac OS X is also a way to
switch from one user account to another.
You can log out of Mac OS X by choosing
➪ Log Out username or by pressing Shift+Ô+Q.
Either way, a dialog box appears that provides two buttons: Log Out and Cancel. Click Log Out
or press Return to immediately log out, or wait 60 seconds for the Mac to do it for you. Click
Cancel to resume working on the Mac, using your current user account.
You also log out when switching to another user account, as Chapter 27 explains.
When you log out, Mac OS X quits all running applications and then displays the login win-
dow. From there, select a user account and enter the corresponding password to log in as
that user. You also can click the Sleep, Restart, or Shut Down icon buttons if you meant to do
one of those actions instead of logging out.
Putting your Mac to sleep (and waking it up)
When you’re not going to use your Mac for a while, you can save energy by putting it to sleep.
When you want to start using your Mac again, you can quickly wake it up. Waking up the Mac
is much quicker than starting it up from being powered off.
It’s usually good to let the Mac sleep during the day when you’re not using it, because Mac OS
X does some background maintenance when asleep that helps keep it operating smoothly.
You can put your Mac to sleep in any of the following ways:
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If you have a MacBook, simply close the screen lid.
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Choose ➪ Sleep.
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If you are using a keyboard with an Eject key, press Control+Shift+Eject or Option+
Ô+Eject to immediately put the Mac to sleep. Or press Control+Eject, and either click
the Sleep option from the dialog box that appears or press the S key.
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Press the power button on your computer (or on your Apple display, if it has a power
button). Then click the Sleep button in the dialog box that appears or press the S key.
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