Note: This article was originally published in 2011. Some steps, commands, or software versions may have changed. Check the current Apple documentation for the latest information.
Apparently after some research there is no way to directly print your screen on a Mac. What I recommend is simply taking a screenshot and saving it to the desktop and then printing that document. You can learn (http://technology.bauzas.com/2011/12/14/how-to-take-a-screenshot-on-a-mac-either-to-the-clipboard-or-to-a-file-on-the-desktop/ “How to: Take a screenshot on a Mac (either to the clipboard or to a file on the desktop)”).
Summary
You’ve successfully learned print a screenshot on a mac. If you run into any issues, double-check the prerequisites and ensure your Apple environment is properly configured.