I installed python 2.6 alongside my mac\'s 2.5.2 version. As soon as I did, python2.6 manage.py runserver failed because it couldn\'t find django.core.management.
I use Bitnami's Django installer, and this happened for me when I wasn't in their custom shell, which I believe sets related python path environment variables. I ran ./use_djangostack in the root of the Bitnami package and then was successful running the server again.