If you are like me and installed the new Oracle SQL developer 2.1 Early Adopter edition on your mac you might have noticed that your user snippets are gone. Also that the directory where you could normally back them up from is no longer working. Well, its only stored in a new location and you can find all your SQL developer settings like your UserSnippets.xml, UserReports.xml and SqlHistory.xml in there.
SQL Developer 1.x location:
SQL Developer 2.1 EA location:
Also note that the new directory is a hidden folder so you might need to use the terminal (or any other way you access hidden files) to access it.