I upgraded my primary machine to Yosemite which has some great new features and a refresh on the look. The upgrade itself went great however I failed to realize that Apache and PHP would also be upgraded. Apache moves to version 2.4 and PHP moves to 5.5. Unfortunately, when Apache upgrades, all the customizations I made to the httpd.conf file get overwritten as well as my php.ini file. After a lot of googling I was able to get my local development environment back up and running. The last hurdle was PHP's GD image package which was missing PNG support.