"Printing a document is usually one of the easiest things you can do on a Mac. Select File > Print, and you are pretty much done - that is, unless your printer refuses to print. Restocking the printer's paper tray will often solve the problem, but when obvious solutions like that do not work; figuring out what to do can be a difficult and time-consuming task. Here are some frequently asked questions and the simple - and not-so-simple - answers that will get your printer moving again."