LuLu
The free, open-source outbound firewall.
About LuLu
LuLu blocks unknown outgoing connections until you approve them. Simple, free and from respected Mac security researchers.
Install LuLu
Download it from the links above, or install it from the Terminal:
brew install --cask lulu Questions about LuLu
Is LuLu free?
Yes. LuLu is free and open source under the GPL-3.0 license. The source code is on GitHub at objective-see/LuLu.
Where can I download LuLu for Mac?
Download LuLu from the developer's website (objective-see.org) and GitHub. MacWorthy links only to official sources.
Can I install LuLu from the Terminal?
Yes. With Homebrew, run brew install --cask lulu.
What are good alternatives to LuLu?
Other security & privacy apps for Mac worth a look are Little Snitch (one-time purchase), OverSight (open source), KnockKnock (open source) and Secretive (open source).
Other security & privacy apps like LuLu
Little Snitch
See and control every network connection.
OverSight
Know when your mic and camera turn on.
KnockKnock
See what's persistently installed.
Secretive
SSH keys that never leave the Secure Enclave.
Strongbox
KeePass and Password Safe, made native.
Tailscale
A private network for all your devices.
