The binaries for MAC OS X installers of PySide are available at:

http://qt-project.org/wiki/PySide_Binaries_MacOSX

Download the latest version that is compatible with your system and perform a similar installation as explained in the previous section.

You can also choose to install PySide from the command line with the help of Homebrew or using MacPorts. The commands, respectively, are as follows:

brew install pyside
port-install pyXX-pyside

Replace XX with your Python version.