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App Open source 1,973 installs/mo

LuLu for Mac

Open-source firewall to block unknown outgoing connections

Quick answer: LuLu is a security tool for macOS. Install it with brew install --cask lulu. Homebrew links this app to a GitHub repository. It has 1,973 Homebrew installs in the last 30 days.

What LuLu is

LuLu is a security tool for macOS: open-source firewall to block unknown outgoing connections.

It is distributed as a Homebrew cask, which installs a .app bundle into your Applications folder. The project is open source and lives at https://objective-see.org/products/lulu.html.

How to install LuLu

  1. Open Terminal (press ⌘ + Space and type “Terminal”).
  2. If Homebrew is not installed yet, run the installer below once.
  3. Run brew install --cask lulu.

Homebrew installer, if you need it:

Prefer a graphical installer? Download it from the official site. MacPicks never hosts or mirrors binaries — the Homebrew command always pulls from the vendor's own release.

Alternatives to LuLu

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Compare LuLu with its alternatives in detail →

Frequently asked questions

How do I install LuLu on Mac?

Run brew install --cask lulu in Terminal. This requires Homebrew; if you do not have it, install it first with the command below.

Is LuLu open source?

Homebrew links this app to a GitHub repository (objective-see/LuLu), which is strong evidence the project is open source. Check the project for the current licence.

Does LuLu run on Apple silicon?

Yes, as a universal binary.

How popular is LuLu?

It was installed 1,973 times in the last 30 days according to Homebrew analytics, ranking #671 in this catalogue.

What version of LuLu is current?

The latest packaged version is 4.5.3.