If you use a Mac, chances are you might not even realize that OS X comes with a firewall. This firewall helps ensure unauthorized app and services can’t contact your computer, and prevents intruders from sniffing out your Mac on a network.
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by Matt Klein via How-To Geek
How to Allow Apps to Communicate Through Your Mac’s Firewall
![How to Allow Apps to Communicate Through Your Mac’s Firewall]()
Reviewed by Ossama Hashim
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April 07, 2016
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