How to Set default applications for file types in Mac OS X

Oftentimes a friend will send you a PDF, MP3 or some other type of document such as a spreadsheet. When you open the file, an application opens. But sometimes it's not the application you wanted to associate with that file. In this video tutorial, you'll learn how to define which programs open what sorts of files. For more, and to learn how to set filetype application defaults in Mac OS X, watch this video tutorial.