Starting memcached can be done by the following command;
memcached -u memcached -d -m 30 -l 127.0.0.1 -p 11211OR;
memcached -d -P pidfile -l 127.0.0.1
Install guide; http://www.glenscott.co.uk/blog/2009/08/30/install-memcached-php-extension-on-os-x-snow-leopard/
Todo – startup item in mac: http://snippets.dzone.com/posts/show/2618