These instructions have been supplanted by an automated, scripted installer, which lives here:
https://github.com/mikepurvis/ros-install-osx
Please try it out, and file bugs as required. Feel free to browse past versions of this gist as a historical curiosity, but I won't be monitoring or supporting it any more.
@giogadi and @kjeremy, I think I might be having the same issue, but explicitly, I get the following error:
ERROR: the following packages/stacks could not have their rosdep keys resolved
to system dependencies:
rviz: Missing resource ogre