How to Turn on Firewall on Mac

Joel Mason

Mac, Tutorials

Are you worried about the security of your Mac? One of the most important steps you can take to protect your computer is to turn on the firewall.

The firewall acts as a barrier between your Mac and the internet, blocking unauthorized access and preventing potential threats from entering your system. In this article, we will guide you through the process of turning on the firewall on your Mac.

Step 1: Accessing System Preferences

To begin, click on the Apple menu located in the top-left corner of your screen. From the drop-down menu, select “System Preferences.” This will open a new window with various settings and options for customizing your Mac.

Step 2: Opening Security & Privacy

In the System Preferences window, locate and click on the “Security & Privacy” icon. This will take you to a new window where you can manage security settings for your Mac.

Step 3: Enabling Firewall

In the Security & Privacy window, navigate to the “Firewall” tab. Here, you will find options related to firewall settings and configurations.

To turn on the firewall, click on the lock icon located at the bottom-left corner of the window. You may be prompted to enter your administrator password.

Once unlocked, click on the “Turn On Firewall” button. This action will enable the built-in firewall feature on your Mac.


  • Firewall Options:
    • If you want more control over which applications can access your network, click on “Firewall Options.” This will allow you to customize settings for specific apps.
  • Incoming Connections:
    • If you receive a lot of incoming connections and want to protect your Mac further, consider selecting the “Enable Stealth Mode” option. This will make your Mac less visible to potential threats.

Step 4: Verifying Firewall Status

After turning on the firewall, you can check its status to ensure it is active and protecting your Mac. In the Security & Privacy window, you should see a green indicator with the text “Firewall: On.” This confirms that your firewall is functioning correctly.


Automatic Firewall Updates: By default, the firewall on your Mac automatically updates itself to provide enhanced protection against emerging threats. It is recommended to keep this feature enabled to ensure you have the latest security measures in place.

Congratulations! You have successfully turned on the firewall on your Mac. With this additional layer of security, you can browse the internet and use your computer with peace of mind, knowing that potential threats are being blocked.

If you ever need to disable or modify firewall settings in the future, simply follow these steps again and make the desired changes. It is essential to regularly review and update your security settings to stay ahead of potential risks.

We hope this guide was helpful in enhancing the security of your Mac. Stay safe!

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