Apple MacBook Pro (17-inch) - Manual (Page 91)

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Troubleshooting
If you have a problem working with your
MacBook Pro, check here first for solutions and
advice.
When you have a problem working with your MacBook Pro, there is usually a simple
and quick solution. Think about the conditions that led up to the problem. Making a
note of things you did before the problem occurred will help you narrow down
possible causes and then find the answers you need.
Make a note of the following:
 The applications you were using when the problem occurred. Problems that occur
only with a specific application might indicate that the application is not compatible
with the version of the Mac OS installed on your computer.
 Any software that you recently installed, especially software that added items to the
System folder.
 Any hardware that you installed, such as additional memory or a peripheral.
You can also find more troubleshooting information in Mac Help and on the Apple
Service & Support website at www.apple.com/support.