Any tool that reverse engineers existing apps will invariably show you machine code and if it is nice show it in assembly language. That would be even less helpful than getting the C source to the app in question for a beginner. If you are looking to debug C source code, there is one built into the Xcode IDE, so you should be able to google for "Xcode debugger" and find tutorials on how to best use the debugger. Have you installed Xcode yet?Absolutely nothing so excuse me for making it sound as if i know what im really going on about... I downloaded something on C Carbon but then read i should understand C first and C++..