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From the Apple menu, choose System Preferences to open the System Preferences window.
- Locate and click Sharing.
- From the Services tab, click Start or Stop to enable or disable the firewall application.
- Close the Preferences window.
How do I enable / disable the Firewall on my Mac?
Mac OS X includes a pre-installed firewall application that you can use to block unwanted network connections that are attempting to establish a connection to your computer.
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