In this article we will show you how to Enable/Disable the Firewall on Mac OS X.
1. First click on the Apple icon in the toolbar to the top left corner. Then go on System Preferences.
2. Then select Security and Privacy.
3. Go to the Firewall tab, and click on Turn On Firewall.
4. The Firewall is now turned on. To turn it off again just click on Turn Off Firewall.