You can easily install the mcrypt extension to PHP5 on Mac OS X Server. Here’s how:
Looking to speed up your SocialEngine, Drupal, or other PHP/MySQL web site? The combination of APC and Memcache can really speed up sites based on these platforms. If you’re an admin of a server running Mac OS X Server (10.6), here’s how to install APC and memcache on Mac OS X server:
Download and install MacPorts from http://macports.org.