What
Firewall prevents contact from other computers on the Internet or on your network. Learn more on Apple Support page.
Time to fix
<1 minute
How to fix
How to turn on Firewall
- Open System Preferences, click Security & Privacy, then the tab Firewall.
- Click the lock icon in the bottom-left, then enter the account password.
- Click Turn On Firewall.
How to enable Stealth mode
- Open System Preferences, click Security & Privacy, then the tab Firewall.
- Click the lock icon in the bottom-left, then enter the account password.
- Click Firewall Options... and then Enable stealth mode.
