Apple MacBook (13-inch, Mid 2010) - Manual (Page 53)

53 Chapter 4 Problem, Meet Solution
Problems That Prevent You from Using Your MacBook
If your MacBook doesn’t respond or the pointer doesn’t move
On rare occasions, an application might “freeze” on the screen. Mac OS X provides a
way to quit a frozen application without restarting your computer.
To force an application to quit:
1 Press Command (x)-Option-Esc or choose Apple () > Force Quit from the menu bar.
The Force Quit Applications dialog appears with the application selected.
2 Click Force Quit.
The application quits, leaving all other applications open.
If you need to, you can also restart the Finder from this dialog.
Next, restart the computer to make sure the problem is entirely cleared up.
If the problem occurs frequently, choose Help > Help Center from the menu bar at
the top of the screen. Search for the word “freeze” to get help for instances when the
computer freezes or doesn’t respond.
If the problem occurs only when you use a particular application, check with
the application’s manufacturer to see if the application is compatible with your
computer. To get information about the software that came with your MacBook, go to
www.apple.com/downloads.
If you know an application is compatible, you might need to reinstall your computer’s
system software. See “Repairing, Restoring, or Reinstalling Mac OS X Software” on
page 56.