Additional instructions for installing Xcode on Mac OS X 10.9 Mavericks
It would be nice to add instructions for installing Xcode and the required command line tools on Mac OS X 10.9 or later, as the Command Line Tools for Xcode is no longer listed on the downloads tab in Xcode's Preferences.
The additional instructions should go under the "Requirements" section of the "Installing PyObjC" page (http://pythonhosted.org/pyobjc/install.html).
To install Xcode on Mac OS X 10.9 or later:
Once you have Xcode installed, open a terminal and run "xcode-select --install".