QGIS won't install on Mac OSX, during install says "The Installation Failed."

I have installed the requirements:

• GDAL Complete 1.11 framework package


• Matplotlib Python module

and I've made sure these requirements are properly installed by checking library/frameworks and /Library/Python/2.7/site-packages.

When I go to install QGis I get an error message stating "The installation has failed. The installer encountered an error that caused the installation to fail. Contact the software manufacturer for assistance."

I am running El Capitan 10.11.