This week's book giveaway is in the Mac OS forum. We're giving away four copies of a choice of "Take Control of Upgrading to Yosemite" or "Take Control of Automating Your Mac" and have Joe Kissell on-line! See this thread for details.
There is a page on this topic here on the Ranch. It only lists the caveats, but there is also a link on that page to a thread where one of our users posted code which worked for him. And of course, as a last resort, links to documentation.