Unity 4.2.1f4 and XCode 5.0 Lexical or Preprocessor Issue

I've upgraded my Unity to 4.2.1f4 and my XCode to 5.0. This was done to try and work around the new device ID handling for iOS7. Now, when I build I receive an error: CharBoostManager.h; Lecical or Preprocessor Issue 'AppController.h' file not found. Nothing in my game has changed from before updating. I'm thinking that I should rollback Unity but don't know which program this problem is actually coming from. And XCode is very difficult to rollback. Anyone else had this problem or found a solution?