Trying to build on mac Stuck at libopenshot

Hi, I'm trying to install OpenShot on a mac by following the instructions in http://openshot.org/files/libopenshot/InstallationGuide.pdf (maybe it's not possible at all, but I thought I'll give it a try...) but encountered a problem trying to branch libopenshot-audio.The guide says to branch it from "lp:~openshot.code/libopenshot/libopenshot­audio" but that path does not exist (anymore?) I did not find any similar path on the ~openshot.code/main path, so I'm pretty much stuck. Can you help?