22 Chapter 1
Note: If the Extensions Manager control panel doesn’t open after a few minutes, restart the
computer holding the Shift key down, so all extensions are turned off. Then open the
Extensions Manager control panel and continue with the steps below.
Once you find that a piece of software is incompatible, try the following:
m Delete its preferences file, if it has one; it may be corrupted. Then restart your computer.
m Reinstall the extension and restart your computer.
m Contact the manufacturer of the extension to see if an updated version is available.
Reset the PRAM
Your computer stores information in an area of memory called parameter RAM, or PRAM
(pronounced “PEA-ram”). Resetting the PRAM replaces the information stored there with the
default (original) settings.
To reset PRAM, follow these steps:
Note: This procedure may not work with some keyboards from manufacturers other than
Apple.
1 Make sure the Caps Lock key is not engaged.
2 Start up or restart your computer and immediately hold down the Command (x), Option, P,
and R keys.
3 Keep holding down the keys until you hear the startup sound a second time, then release the
keys.
4 If you had special settings in any control panels, open those control panels to reset the
desired settings.
Make Sure Memory and Expansion Cards Are Installed Correctly
If you’ve recently installed RAM, make sure you’ve used the correct type of memory for your
computer. For more information, see the memory specifications in the documentation that
came with your computer.
If you recently installed RAM or an expansion card in your computer, check the installation
information in the documentation that came with your computer to make sure the memory
or card is properly installed. If you purchased an expansion card from a manufacturer other
than Apple, contact the manufacturer if you need further help.
Important When you reset the PRAM, preferences for the Memory and AppleTalk control
panels are lost. Make a note of the settings in these control panels before you reset PRAM.
Some third-party software programs also store information in PRAM. You may have to
reconfigure video cards after resetting PRAM, and other aspects of your work may be
affected.
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