There is a supporting script from MySQL that handles the start/stop/status functions for the preference pane. You can easily write a Launchd plist file to auto-start MySQL, but the nice MySQL preference pane that allows a user to turn MySQL off and on again would not function. Yosemite will not autostart via a StartupItem. This setup has been out of date since the OS X 10.4 days. MySQL had been using a StartupItem configuration to allow an end user to easily set MySQL to start on boot. There were long outstanding bugs that were resolved and deprecated commands/functions that were finally removed. The upgrade to Yosemite did spring cleaning to OS X. Then Yosemite was released recently and our installer had a few issues. We took the installer one step forward by adding features for installing a modified MySQL configuration file, and Sequel Pro (a GUI front end for MySQL).
INSTALL MYSQL ON MAC INSTALL
The default install has root enabled without a password. Our installer took care of those items as well as set the root password randomly. MySQL had a GUI installer for OS X that worked well, but was missing a few things that made it ready to work with Apache/PHP out of the box. Which coincidentally is not long after Oracle acquired Sun which included MySQL. With the move to Server.app, Apple removed MySQL. In OS X 10.6 and prior, MySQL was included with the “Server” version of the OS. A few years ago we started writing scripts that help install MySQL on OS X.