LuLu is the free, shared-source firewall for macOS. It's goal is simple; block any unknown outgoing connections, until approved by the user. While it was designed to generically detect malware by flagging unauthorized networking

Little Snitch is a network monitor, personal firewall, and Mac app blocker that lets you allow or deny every connection.

Murus Pro unleashes the great power of PF, offering a very wide set of features. It is a complete frontend for PF, and is bundled with Murus Logs Visualizer, an app to analyze PF logs and statistics, and Vallum, an application-layer

Radio Silence is an outbound application firewall that lets you block Internet access from individual apps.

Little Snitch is a trustworthy and handy macOS application capable to monitor your network traffic and block various connections in order to protect your privacy.

The Firewall – Network Monitor application gives you the full control over your Mac, protects the privacy of your computer, prevents unwanted network connections. Full Network Transparency!

Protect your privacy. Keep an eye on Internet connections from all applications as to expose the hidden connections. Prevent them from sending data without your consent, hence avoiding information leakage.

Little Snitch 4 gives you control over your private outgoing data. Track background activity As soon as your computer connects to the Internet, applications often have permission to send any information wherever they need to. Little

Scudo is a hybrid firewall for macOS that combines an inbound network-layer packet filter with an outbound application-layer firewall. Scudo helps protecting your Mac’s network services from unwanted connections from remote computers and

Vallum is a little tool that helps you monitor and block application connections. It is able to intercept connections at the application layer, and hold them while you decide whether to pass or block them. Vallum's interface is very

TripMode automatically reduces your mobile data consumption when you use a mobile hotspot

Hands Off! is an application to monitor and control the access of applications to your network and disks. Being able to monitor the normally unnoticeable activities enables you to make informed decisions regarding the transfer of your

Little Snitch... A firewall protects your computer against unwanted guests from the Internet. But who protects your private data from being sent out? Little Snitch does!

This functional and easy to use tool for OS X platforms can be used to monitor the activity of applications that can establish a connection to the Internet. Thanks to Hands Off! user will be able to timely detect signs of malicious or

Murus Pro unleashes the great power of PF, offering a very wide set of features. It is the most complete front-end for PF. and is bundled with the companion app, Murus Logs Visualizer. Access all advanced options to build and maintain a