by There is a common belief, indeed, Macs do not require an antivirus or firewall since there aren’t any security holes. This is, however, an error. In the past three years, the number of viruses and Mac malware detected has increased dramatically because Mac users do not protect themselves from malware with firewalls or antivirus software.
MacOS comes with a built-in firewall, which is turned off by default. It should be activated (we’ll explain how), but it’s not necessarily enough security.
A firewall is an arrangement designed to block unauthorized access to and within private networks. It can be implemented as software, hardware, or a combination of both. Firewalls can block unauthorized Internet users from using private networks linked to the Internet.
We suggest you use them to stop viruses from entering your computer and protect your privacy. Are you looking for a no-cost antivirus for your Mac PC? We have compiled an overview of your top and most reliable choices.
Also Read- Best Antivirus Software For Windows
List of Best Firewall Apps for Mac OS X in 2025
If you’d like to be sure, install a firewall on your Mac. The majority of security companies offer a specific Mac version. We’ve tested the top best firewalls available for Mac and compared the results here.
1. Little Snitch
While Mac systems are less vulnerable to malware threats, data security is urgent. Little Snitch for Mac allows users to block the release of personal information, but its limited features could make it unworth the cost.
The Little Snitch application for Mac is available to try at no cost for 30 days. After this, $29.95 buys the full version, with no limitations. Although it comes with a native installation program, loading the program was difficult as it required restarting. A lengthy and complex user agreement was also needed to be signed. Support for technical issues and updates are available. However, the program has no clear instructions on how to use it. Although advanced users will not likely have problems in this regard, complex permissions required to customize the program might be too tricky for beginners.
The program needs little involvement and runs in the background regarding function. After setting defaults, it scans the user’s system for applications that transmit data. This cannot be assessed because we found no applications that attempted to accomplish this, even though the program said it was running. Although this may sound similar to firewalls, the application declares itself a privacy program, not an all-encompassing security application.
2. Radio Silence
Radio Silence is a tiny firewall that blocks any program from accessing the Internet. It is specifically designed for those who do not have the time to set up traditional firewalls. Radio Silence supports OS X Yosemite, Mavericks, Mountain Lion, Lion, and Snow Leopard. It takes only some minutes to install.
Radio Silence lets you disable outgoing access for any application you’d like. We like it because it is maintenance-free and always online. However, it monitors every connection you have in real time, which means that all secret processes will instantly be exposed. The application will also not require your consent, which could make your computer vulnerable.
The radio silence option is straightforward to use. It doesn’t require a lot of space and is extremely rapid. Additionally, it’s incredibly user-friendly, so you don’t need to be a tech expert to set it up. However, you’ll have to shell out $9 to gain access to all functions.
3. Murus Lite
Murus Lite allows users to verify the most sophisticated network settings. The process involves dropping and dragging items such as moving sliders, check boxes, etc. It is a free firewall for Mac, and anyone new to the technology can use it. The Murus Lite firewall can prevent unwelcome networks from entering and outgoing connections and block internet access to specific applications. Furthermore, the Murus lightweight firewall can regulate the app’s network and stop and control personal data leakage.
Murus Lite is the front-end entry-stage firewall. Everyone can download and use it for no cost. It has inbound filtering and recording and can be used to safeguard applications that run on the Mac. Although it is free, Murus Lite isn’t attempting to test or demonstrate. Instead, it’s a fully-featured application that is a good beginning point for a new user.
A firewall is part of network security by filtering outgoing and incoming system communications based on specific rules. As a result, legitimate network communication is streamed seamlessly, and any unwanted network communications are halted. I hope this article helped you choose the right firewall for your device.
