If you’re using CodeIgniter on Mac OS X, and you have a .htaccess file that looks something like this:

RewriteEngine on
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^(.*)$ index.php?/$1 [L]

If you’re finding that it doesn’t seem to be working, and you’re getting 404’s when trying to access any controller other than the front controller, you might want to check on your main httpd.conf file to make sure that you don’t have an AllowOverride None that is preventing your .htaccess directives from being executed.

The main apache configuration file on Leopard is here:

/private/etc/apache2/httpd.conf

Hopefully this saves someone a couple of hours and a couple of Tylenol.