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Table of Contents
How to check and enable Mac firewall
Firewall setup suggestions: Not just open it
How do you know that the firewall is working normally?
Home System Tutorial MAC How to enable Firewall on Mac

How to enable Firewall on Mac

Jul 29, 2025 am 02:37 AM
firewall mac

To check and enable Mac firewall, first open system settings or system preferences, enter the network or firewall options, click the switch to start the firewall, unlock and enter the administrator password if necessary. It is recommended to check Block all incoming connections for enhanced security while keeping the connection automatically allowed to be received by Apple signed software to ensure the normal operation of the system application. Turn on Stealth Mode to improve security under public Wi-Fi. You can view the firewall status through the terminal command sudo pfctl -s info, and it shows that Enabled is enabled successfully. You can also use online tools such as GRC ShieldsUP! to verify the firewall effect. Regularly checking the firewall settings helps ensure equipment and data security.

How to enable Firewall on Mac

The Mac's firewall is turned on by default, but many people don't know how to confirm or adjust its settings. If you are worried about device security or want to make sure the firewall is actually running, it only takes a few simple steps to do it.

How to enable Firewall on Mac

How to check and enable Mac firewall

Open system settings and confirm whether the firewall is enabled is the most direct way:

How to enable Firewall on Mac
  • Turn on System Settings or System Preferences
  • Enter the network or directly look for the firewall option (different macOS versions may vary slightly)
  • After clicking to enter the firewall settings interface, you will see a switch button
  • If "Close" is displayed, click "Start" to turn on

In some versions, you need to click on the lock icon in the lower left corner first and enter the administrator password to change the settings.


Firewall setup suggestions: Not just open it

Although opening the firewall is the first step, some basic settings are also worth noting:

How to enable Firewall on Mac
  • Block all incoming connections?
    You can check this option to enhance security, but be aware that this may restrict remote access, file sharing and other features.

  • Automatically allow software signed by Apple to receive incoming connections
    It is recommended to keep it enabled so that the applications that come with the system will not be blocked by mistake.

  • Enable Stealth Mode (Invisible Mode)
    After turning on, your Mac will be more difficult to detect during network scanning, and is suitable for users who often connect to public Wi-Fi.


How do you know that the firewall is working normally?

You can quickly view the firewall status through terminal commands:

  1. Open Terminal
  2. Enter the following command and press Enter:
     sudo pfctl -s info
  3. If you see Status: Enabled , it means that the firewall has taken effect

Note: This command is only applicable to macOS versions using the pf firewall mechanism, and is generally supported from Yosemite and later.

In addition, you can also try to use online tools (such as GRC ShieldsUP! ) to see if your Mac is well hidden from the outside.


Basically that's it. Turning on the firewall is not complicated, but it is easily overlooked. Check the settings regularly, which is helpful for daily use and data security.

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