Enabling mod_rewrite in OS X 10.5 & 10.6

Apache's [mod_rewrite][1 functionality allows you to redirect and rewrite your web site URLs, providing a developer with an easy way of creating human readable, well structured and, most importantly, navigable page addresses. It's used by almost all Apache-based software from Wordpress to Codeigniter. Enabling it within Apple's latest iteration of Mac OS X is, unfortunately, a bit of a fiddle.

Updating the Apache configuration to allow the use of this functionality is achieved by modifying two files, one for the global web-server directory and one for your local web-server directory, (the much easier-to-access ~/Sites folder). The first file to be modified is the global configuration file, and it needs to be modified around line 205.

# AllowOverride controls what directives may be placed in .htaccess files.
# It can be "All", "None", or any combination of the keywords:
# Options FileInfo AuthConfig Limit
AllowOverride All

The second file, allowing you to use mod_rewrite within your own ~/Sites folder, is the one that seems to break Apache on a more regular basis. The values below, located at the top of the file, yielded the best results, enabling the functionality without causing server errors.

<Directory "/Users/beseku/Sites/">  
  Options Indexes FollowSymLinks MultiViews
  AllowOverride All AuthConfig
  Order allow,deny
  Allow from all

After making and saving these changes, you'll need to restart Apache, (easily done via the ’sharing' system preference pane, just un-check then re-check the ‘Web Sharing’ checkbox). If everything went well, Apache should start up again and you should have full mod_rewrite functionality.