The Knots directory was (and is) in my home directory. I did everything according to the wiki (though maybe I did it wrong): "Run: git clone git://github.com/solmis/knots.git Then start the server with: cd knots ./knots.rb OS X users can create a standalone app too: ./install/create_osx_app" And then I moved the "Knots" app from home/knots/os x to /Applications.