I solved the problem by adding location of site-packages, where I have kept django subdirectory (/Library/python/2.7/site-packages) to WSGIDaemonProcess:
WSGIDaemonProcess www.example.com processes=2 threads=15 display-name=%{GROUP}
python-path=/Library/python/2.7/site-packages
If you are using embedded server mode use in httpd.conf
:
WSGIPythonPath /Library/python/2.7/site-packages