Firewall for Mac OSX

Trying to NoobProof from

EDIT: Works as advertised, at least for blocking outgoing connections to specific URLs, which is what I was looking for (through blacklists). It is merely a GUI for the ipfw firewall installed by default (that’s what the “regular” firewall uses, except the UI for that only allows you to block incoming connections) and so in order for it to be active, you need to have the regular firewall turned on.