User:Kjkiser2/Formatting the Hard Disk

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Formatting the Hard Disk

Apple Tech Note 107437 gives this procedure:

Steps for zeroing data

These steps assume you have a Mac OS X 10.2.3 or later CD:

  1. Insert the Mac OS X CD
  2. Restart the computer
  3. Immediately after the startup sound, press and hold the C key to start up from CD
  4. When the Installer screen appears, do not click Continue. Instead, choose Installer > Open Disk Utilities
  5. Select the hard drive to erase
  6. Click the Erase tab
  7. Select the volume format from the Volume Format pop-up menu
  8. Click Options
  9. Select the checkbox for Zero all data
  10. Click OK
  11. Click Erase

Also for those wanting to "Clean" individual files note this section from the technote: Secure Empty Trash

  • Note: When you securely empty the Trash, the deleted data cannot be recovered by disk utilities. You should only do this if you have a backup or you are sure you will never need the data again."