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Start the Built-in Firewall in
Mac OS X

To pause, click the video once. Click again to play.

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Step-by-Step Instructions

  1. Pull down the Apple icon in the top left corner of your Desktop
  2. Select System Preferences from the menu.
  3. Under the category Internet & Network click on the Sharing icon.
  4. Make sure the Firewall tab is selected.
  5. Click the Start button to enable the built-in firewall in your operating system.
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