Best Firewall for Mac in 2024 – Top Security Software Picks


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A robust firewall is your first line of defense against cyber threats. Not having a firewall leaves you vulnerable to unauthorized access, data breaches, and the ever-evolving tactics of cybercriminals.

Although Mac has a built-in firewall, it primarily blocks incoming connection requests, leaving you vulnerable to outgoing security threats. So, it’s better to be safe than sorry.

This guide brings a curated list of the best firewall for Mac, ensuring your digital experience remains secure and seamless.

We’ve explored various options, weighing their features and capabilities to present you with top picks tailored to diverse needs.

Best Firewall for Mac in 2024

1. Avast Premium Security

Avast Premium Security

Avast Premium Security for Mac offers certified malware protection, a speedy full scan, excellent phishing protection, ransomware protection, and Wi-Fi intruder detection. It has been recognized by independent testing labs for its effectiveness.

The software features a user-friendly interface with core shields, a virus chest, and a Wi-Fi inspector.

However, it doesn’t add significantly more features compared to Avast’s free edition, and it is more expensive than most of its competitors, priced at $39.99 per year for one license.

While it offers detailed reporting on devices and real-time notifications of new connections, it doesn’t provide a direct way to act if a new connection is deemed unsafe. Despite these cons, it remains a viable option for those seeking additional protection features.


  • Certified by independent testing labs
  • Speedy full scan and excellent phishing protection
  • Ransomware protection and Wi-Fi intruder detection


  • More expensive than most competitors
  • Features annoying ads

2. Little Snitch

Little Snitch

Little Snitch, particularly its Mini version, stands out as a user-friendly network monitor for Mac, offering visibility and control over app connections. It effectively blocks unwanted connections, raising awareness of apps communicating with unknown servers.

Its comprehensive nature enhances privacy and data security.

However, the regular version gives too many alerts, leading to user fatigue. The Mini version fixes this by having simpler controls and only showing important alerts, so it’s good for individuals and families.

It’s not a perfect solution, but it helps balance ease of use and safety, making you more aware of what your apps are doing online.


  • Comprehensive network monitoring
  • User-friendly interface (Mini version)
  • Balances convenience and security


  • Regular version can be overwhelming with alerts
  • Not a complete protection solution

3. LuLu


LuLu, developed by Objective-See, is an open-source firewall exclusively designed for macOS, available for free on GitHub. It effectively blocks unknown outbound connections by requiring your approval, offering a layer of security against malware and unwanted network communications.

Similar to Little Snitch, LuLu notifies you if an app attempts an internet connection, allowing you to block or permit the connection temporarily or permanently.

You can modify rules based on domains or processes and monitor real-time app activities through its network monitor feature.

While it doesn’t provide the same level of control as Little Snitch, its zero-cost feature makes it an attractive option. However, it does have limitations in controlling temporary rules.


  • Completely free and open-source
  • Customizable rules offer flexibility in managing connections
  • Network monitor lets you analyze real-time app activities and connections


  • Offers less control than paid alternatives
  • Offers basic features but lacks advanced features

4. IceFloor


IceFloor stands out as a PF firewall featuring a visual interface, renowned for managing PF setups, logging, bandwidth, diverse filtering types, and several other connections.

It operates by forming multiple groups that either block or allow connections, assigning specific parameters, addresses, and more, which some users might find a bit intricate.

IceFloor aims to provide an extensive and user-friendly interface for managing the PF firewall, making it accessible for new and experienced users.

Despite being available at no cost, IceFloor does not compromise on offering a comprehensive feature set, ensuring you don’t miss out on advanced functionalities typically found in paid versions.


  • Free and open-source
  • Group-based approach for easier management of firewall settings
  • User-friendly interface suitable for users with varying levels of expertise


  • The group-based approach has a learning curve for newcomers
  • Its operation can be complex for users unfamiliar with creating groups

5. Radio Silence

Radio Silence

Radio Silence monitors and blocks outgoing network connections from any application, providing enhanced control over the communication of individual apps with external servers.

This feature is essential for preventing unauthorized data transmission and ensuring user privacy. With a sleek, macOS Sierra-inspired interface, it offers a one-click solution to prevent apps from covertly communicating with external servers.

The software runs quietly in the background, with no impact on system performance, ensuring a seamless user experience.

Its Network Monitor offers real-time feedback on the ongoing network activities of various applications, letting you gain insights into which apps are attempting to establish connections and the nature of the data being transmitted.


  • Easy to use with a one-click blocking feature
  • Provides insight into background network activity
  • Does not hinder system performance
  • Allows selective blocking of applications by adding them to a blacklist


  • No option to whitelist blocked applications individually
  • Cannot micro-manage multiple connections from the same source

6. Murus


Murus is a comprehensive firewall solution for macOS, designed to provide you with enhanced control over the OS X PF (Packet Filter) firewall through a user-friendly graphical interface. It eliminates the need for command-line configurations, making firewall management accessible to users of all technical levels.

Murus offers a variety of configuration presets, complete with comprehensive explanations, catering to novice, intermediate, and expert users.

Another notable feature of Murus is the option to save and import personalized configuration presets. It lets you create and store customized firewall settings tailored to your needs and preferences.

In addition to the core features, Murus offers a suite of additional tools, like a logs visualizer, which assists you in monitoring network activity by presenting detailed and organized logs. This tool is invaluable for identifying potential security threats and analyzing network traffic patterns.

Murus also includes a Java port-knocking client, a security tool that enhances firewall protection by establishing a communication protocol for opening ports.


  • Simplifies the configuration of the OS X PF firewall
  • Offers predefined presets for different user knowledge levels
  • Allows for the creation of custom services and assignment of port numbers and protocols
  • Allows switching between different firewall configurations with ease


  • The initial interface might be disconcerting for first-time users
  • Relies wholly on the OS X PF firewall for functionality

7. AVG Antivirus

AVG Antivirus

AVG Antivirus for Mac offers basic but commendable protection, notably excelling in phishing detection. Certified by two antivirus testing labs, it provides a clear and user-friendly interface, all at no charge. AVG offers real-time protection, constantly scanning for suspicious activity. It promptly detects and blocks malware, phishing attempts, and other threats before they can harm your system.

However, it does have its limitations. The software lacks some bonus features found in competing free apps, and some recommended fixes require payment.

Plus, its detection of Windows malware has decreased since the last test. While AVG covers the essentials and is a viable option for basic protection, users seeking more comprehensive features might explore other alternatives.


  • Certified by two antivirus testing labs
  • Excellent phishing detection
  • Clear, simple user interface
  • Free


  • Lacks bonus features found in competing free apps
  • Some recommended fixes require payment

8. Scudo


Scudo is a hybrid firewall designed specifically for macOS. It combines an inbound network-layer packet filter with an outbound application-layer firewall.

This dual-layer approach helps protect your Mac computer’s network services from unwanted connections from remote computers and improves your privacy and security by controlling both incoming and outgoing traffic.

Scudo is known for its easy and intuitive interface, making it accessible even for users who are unfamiliar with firewalls and networks. It is a lightweight application that uses minimal system resources and can be controlled via a small shield-shaped icon in the macOS menu bar.


  • Simple and intuitive user interface
  • Doesn’t hog system resources
  • Features a handy menu bar icon for quick access
  • Offers two-way protection for incoming and outgoing internet traffic


  • Not free



ESET Cyber Security for Mac offers comprehensive protection with a suite of useful bonus features. It effectively detects Windows malware and provides comprehensive scan scheduling options and simple device control.

The software is compatible with macOS versions back to 10.12 (Sierra) and is priced competitively at $39.99 per year for one license.

However, it has some shortcomings. The antivirus no longer holds current certification from independent testing labs, which might raise concerns about its efficacy. Plus, it didn’t score too well in hands-on antiphishing tests, indicating vulnerability.

So, while ESET offers decent antivirus protection for Mac, users seeking more assurance might consider alternatives.


  • Offers extensive protection against various types of malware
  • Effectively detects and eliminates Windows malware, preventing your Mac from becoming a carrier
  • Provides comprehensive scan scheduling options


  • No current lab certification
  • Less sophisticated device control on Mac compared to Windows

10. Vallum 4 Firewall

Vallum 4 Firewall

Vallum Firewall for Mac is a robust security solution that offers comprehensive monitoring of both outbound and inbound connections from various apps on your Mac, like Little Snitch and LuLu. When an app attempts to connect to the internet, Vallum promptly notifies you.

You can configure elements of each rule, including target hostname or IP, port, protocol, and user, with the option to edit and apply more advanced criteria as needed.

Vallum Firewall is a versatile and affordable choice for Mac users seeking enhanced security through meticulous connection monitoring and customizable rules.

While the interface may present an initial learning curve, the powerful features and bundling options make Vallum a valuable addition to your Mac’s security arsenal.


  • Users can easily customize connection rules based on various parameters, ensuring tailored security.
  • Offers a cost-effective solution with an unlimited trial available
  • Features an icon-based interface
  • Vallum can be bundled with Murus, a front-end for macOS’s built-in firewall, offering additional security layers.


  • Some users might find Vallum’s interface and setup a bit confusing initially.
  • The unlimited trial version comes with a popup reminder every four hours

Frequently Asked Questions

Which firewall is best for Mac?

Choosing the best firewall for Mac depends on individual needs, but Avast, Little Snitch, and IceFloor are great options. They offer robust protection, user-friendly interfaces, and additional security features. Researching and considering personal requirements and preferences will help you select the most suitable firewall for your Mac.

How strong is the Mac firewall?

The Mac firewall is robust and efficient, providing a strong defense against unauthorized connections. It blocks incoming connections that are not essential while allowing legitimate software to communicate. However, you should consider additional third-party firewall solutions and maintain good cybersecurity practices for enhanced security.

What is the strongest type of firewall for Mac?

Mac’s strongest type of firewall is likely a comprehensive security suite that combines traditional firewall protection with additional features like antivirus, anti-malware, and anti-phishing. Solutions like Avast and AVG are considered strong options, offering advanced multi-layered protection and additional security tools.


Safeguarding your Mac against cyber threats is crucial in this digital age. While the Mac’s built-in firewall provides a foundational defense, supplementing it with a robust third-party firewall enhances your security posture.

This guide has explored various firewall options with unique features, pros, and cons to help you make informed decisions. From the comprehensive protection offered by Avast Premium Security to the user-friendly nature of Little Snitch and the open-source benefits of LuLu, there is a solution tailored to every need. Balancing individual requirements, features, and budgets will guide you in selecting the most suitable firewall for optimal protection in 2024.

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