A lightweight and fast application firewall for macOS

TCPBlock for Mac

TCPBlock for Mac

  -  1.1 MB  -  Freeware
  • Latest Version

    TCPBlock 4.2 LATEST

  • Review by

    Daniel Leblanc

  • Operating System

    Mac OS X

  • User Rating

    Click to vote
  • Author / Product

    Jo Delantis / External Link

  • Filename


  • MD5 Checksum


TCPBlock is a free and easy-to-use firewall application for your macOS 10.5 or newer computer that focuses its attention on identifying and preventing unauthorized programs for establishing outgoing contention from your PC to the internet. This prevents various malware programs from reaching out to their servers and sending data they collected on your Mac or brings down even more harmful viruses to your system.

⚠ Note: This product is not developed anymore and might not function properly.

If you are looking for an alternative, we recommend you to download Little Snitch.

Having a powerful firewall installed on your Mac represents the first line of defense against countless types of online threats that are constantly connecting to desktop and laptop computers of ordinary people and businesses, seeking victims for spreading their malicious software or stealing confidential or private data.

Visually, TCPBlock for Mac is a little bare and business-like, offering everyone from novices to professionals an easy way to see listings of their local applications that are requesting connection to the internet. These connections can be easily managed and organize so that you always have full control over the way your home internet connection is utilized.

This fast, reliable, and easy-to-use program was built to protect your Mac from the very moment it starts to power on, and because that majority of it is integrated tightly with the macOS kernel via a carefully designed module.

After boot, TCPBlock reads the configuration file that the user has made by visiting its preference pane in System Preferences, and from that moment on takes the role of watchful guardian of your system.

  • TCPBlock 4.2 Screenshots

    The images below have been resized. Click on them to view the screenshots in full size.

    TCPBlock 4.2 Screenshot 1
  • TCPBlock 4.2 Screenshot 2
  • TCPBlock 4.2 Screenshot 3

What's new in this version:

- Solved an error related to connecting apps display.