A firewall is an essential security tool for your Mac. Not only does it help keep your Mac safe from security threats online, ...

Paragon Firewall for Mac helps you control programs and services that send information to the Internet, making sure not a single bit of data leaves your computer without your permission.

As the Apple firewall is often active by default ... so it is not reliably reproducible," Little Snitch developer Norbert Heger told Mac & i. "But when it does occur, it is in such a way that ...