Zapping PRAM in Mac OS X does not do some of the things zapping PRAM did in Mac OS 9.X or earlier. Monitor and network settings are no longer stored in PRAM, so zapping PRAM will not fix problems with monitors or networks. It will, however, reset the computer's clock, startup speaker volume, sound volume, recent kernel panic information, and the DVD region code setting. Visit Apple's web site to learn more about zapping PRAM.
Note: Mac OS X stores your preselected DVD region choice in PRAM for easy access. Resetting PRAM does not allow you to change the DVD region.
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