When a program suddenly quits in OS X without any user direction, it usually means the program has crashed. The system will likely show the crash reporter window that you can submit to Apple to help the developers troubleshoot their code and correct the problem. However, if you are running OS X Lion then you may run into a situation in which applications you have open will close without showing any indication of a problem.
As an example, go ahead and open TextEdit and close any windows that open up. Then go through your Applications folder and launch a number … Read more