Long story short, when I write the following:
sudo easy_install MySQL-python
I get the error
EnvironmentError: mysql
The issue you are having is that the gcc compiler is not installed on your Mac. It will be installed if you have installed XCode. You will have to download gcc complier and install it manually. Follow the below link and download it -
https://github.com/downloads/kennethreitz/osx-gcc-installer/GCC-10.7-v2.pkg
I once had this problem installing Ruby 1.9 and I had to compile ruby for myself because Mountain Lion wasn't supported at that time. After installing the package, verify the install by the command gcc.