Developer website: If Then Software
xChek is merely a "prank" application that you can sneak onto an unsuspecting mark's computer--it will run automatically when it's launched--hopefully your unsuspecting mark will gasp in horror when they are told by xChek what is wrong with their computer (which is really nothing)--the great thing is that it doesn't do anything! It's just a dummy window with some dummy progress bars and some pretty funny "diagnostic" results. It is loosely based on "Diskwarrior" and "Norton Disk Doctor," but again, it's simply "jokeware."
Mac OS X 10.2 or later (and a sense of humor).