I have been trying to install the latest version of mod_wsgi (3.3) since hours on my Mac. I\'m on Snow Leopard and I have the versions of Apache (Apache/2.2.15) and Python 2.6.1
The problem you had was the path to mod_wsgi.so. On OS X the appropriate line is
LoadModule wsgi_module libexec/apache2/mod_wsgi.so