How do I enable the built-in firewall in Mac OS X?

This FAQ was last modified on: Tuesday, January 16, 2018 08:48pm

Mac OS X has a built-in firewall that will block most incoming network connections when enabled. It will not block outbound connections, so you still need to be careful about which applications you run. To enable the firewall:

  1. Open "System Preferences"
  2. Click "Security & Privacy"
  3. Go to the "Firewall" tab
  4. Click the Start button
  5. Quit System Preferences

Learn more by clicking this link to Apple's support documentation for the OS X Firewall