Monitor and control applications on your Mac accessing remote servers on the Internet. Add automated blocking capabilities for all outgoing online connections. Prevent third-party apps or macOS system services and components from sending private data to unknown Internet servers.
LuLu 1.2.3 for Mac is available as a free download on our application library. Our antivirus check shows that this Mac download is malware free. The program is categorized as Security Tools. The actual developer of this free Mac application is Objective-See.
From the developer:
LuLu is the free, open-source macOS firewall that aims to block unknown outgoing connections, unless explicitly approved by the user.
You may want to check out more Mac applications, such as Soda PDF, which might be related to LuLu.