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How to Protect Your Mac OS X Snow Leopard’s Files

The Info dialog on Mac OS X Snow Leopard gives you the chance to protect your files and folders by locking them. Locking prevents accidental deletion or editing. By locking a file, you allow it to be opened and copied ¯ but not changed, renamed, or sent to the Trash. Locked items appear in the Finder with a small padlock attached to the icon.

To lock or unlock a file, you have to have ownership of the file. On a Mac where you’ve configured only one administrator account, you should already have ownership.

If you’re considering changing the ownership of a system-owned file, don’t do it. You could throw a serious monkey wrench into your Snow Leopard system.

To lock a file, follow this procedure:

  1. Display the Info dialog for the item by Command+I or choosing File→Get Info.

  2. Select the Locked check box to enable it.

    The Locked check box is in the General section of the Info dialog.
    The Locked check box is in the General section of the Info dialog.
  3. Close the Info dialog to save your changes.

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