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Zapping Basics

If corrupted PRAM is preventing your startup hard disk from mounting, especially if it causes a Sad Mac to appear, you may need to start up with a floppy disk, such as your Emergency Toolkit disk, before you can zap the PRAM.

TAKE NOTE — Warning for Users of RAM Disks

Zapping the PRAM will erase all data on a RAM Disk created via Apple's Memory Control Panel. Be sure to back up any critical data on your RAM disk before you zap!



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