Yes! Apple's built-in firewall only blocks incoming connections. LuLu is designed to detect and block outgoing connections, such as those generated by malware when the malware attempts to connect to it's command & control server for tasking, or exfiltrates data.

Microsoft Defender ATP for Mac - Windows security Running other third-party endpoint protection products alongside Microsoft Defender ATP for Mac is likely to lead to performance problems and unpredictable side effects. If non-Microsoft endpoint protection is an absolute requirement in your environment, … macos - What's the "built-in" firewall in OS X 10.9? - Ask The firewall in OS X 10.9 is now "pf". It is controlled by the tool pfctl which can also give you a lot of status about the firewall itself. Try sudo pfctl -s all and you will get a huge dump of info. If you want a lot of information you can add one or two -v to the front of the options for even more info - sudo pfctl -v -v … Mac Firewall – HMA Support Sep 24, 2019

Best Free Firewalls for 2020 (9 for Windows and 1 for Mac)

Fire up your Mac's firewall Worried about your networked Mac? Protect yourself with OS X's built-in firewall. Here's how. But there’s more to the the built-in firewall than meets the eye, so macOS - Security - Apple The most secure browser for your Mac is the one that comes with your Mac. Built-in privacy features in Safari, like Intelligent Tracking Prevention, help keep your browsing your business. Automatic strong passwords make it easy to create and use unique passwords for all the sites you visit. Change Firewall preferences on Mac - Apple Support

Mac Security: Firewalls | Macworld

The firewall on the MacBook will follow the rules you set up on what to block or allow. When enabled, the firewall blocks all traffic that comes into your MacBook. By default, however, the firewall is turned off. So, your first job is to enable the firewall, which you can do by following these steps: Click the System Preferences icon in the Dock. 11 Best Free Firewall Programs (Updated July 2020) Jul 02, 2020