[Answered ]-Mac OS 10.9's (Mavericks) deinstalled Django

Did you install Django into your main Python directory? If so, the version of Python might have been upgraded. This might have wiped your central site-packages. If, so, just reinstall Django.

Alternatively, and more advisable, use virtualenv. This will create a separate Python environment (including site-packages for each project), preventing this (probably) from happening again in future.

Install VirtualEnv Systemwide then setup virtual env

Installing

sudo easy_install virtualenv

now create project folder and cd into that after that

 virtualenv venv
. venv/bin/activate

then install django using pip

pip install django