访问django官网下载，然后解压安装。
#tar xzvf Django-1.x.y.tar.gz
#cd Django-1.x.y
#sudo python setup.py install
#sudo ln -s /Library/Python/2.7/site-packages/Django-1.8-py2.7.egg/django/bin/django-admin.py /usr/bin/django-admin.py
#django-admin.py startproject mysite
#cd mysite
#python manage.py runserver