Give the gift of Drupal. All merchandise is 50% off through 2016.
Mac OS X 10.4 Tiger comes with PHP (though it's disabled by default) and without MySQL. Here's how to get Drupal up and running from a stock Tiger installation.
The simplest way to install MySQL server is to download the MySQL OS X package from: http://dev.mysql.com/downloads/mysql/5.0.html#macosx-dmg