LuLu
LuLu is a macOS firewall app that lets you monitor and control network connections, especially outgoing connections from apps and processes.
What is LuLu?
LuLu is a native macOS security and privacy app that helps users control which apps and processes can access the network. Built by Objective-See, it focuses on outgoing connection monitoring, so you can allow or block internet access when software first tries to connect. This makes it useful for privacy-conscious users, security researchers, developers, and anyone who wants more visibility into background network activity on a Mac. LuLu also supports rules that reduce repeated prompts and includes network-monitoring tools for reviewing connection behavior over time. It is commonly used alongside macOS's built-in protections when users want per-app network control and clearer insight into unexpected connections.
Key features
- Allow or block outgoing network connections from individual apps
- Create rules so trusted apps can connect without repeated prompts
- Review network activity to see which processes are making connections
- Monitor background connection attempts that may otherwise go unnoticed
- Use system-friendly rules to avoid interrupting essential macOS networking
- Get more visibility into per-app network behavior on your Mac
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Safety overview
Status: Mostly safe
LuLu is legitimate macOS security software, but its purpose requires deep access to network activity and persistent background components so it can filter and alert on connections. That behavior is consistent with a firewall app. Users should expect security or network-related prompts during installation and should download it only from Objective-See's official site to avoid modified copies.
Recommendation: Keep LuLu if you use it to monitor or restrict app network access on your Mac. If you no longer want firewall prompts or per-app outbound filtering, you can remove it, but doing so will stop its connection alerts and rule-based network control.
Common paths
/Applications/LuLu.app/Library/Objective-See/LuLu
Support paths
/Library/Objective-See/LuLu
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