Hi, I got into writing iPhone apps a while ago. I wrote an app and got it nearly ready for submitting to the app store under iOS 3 before I got distracted. Now a few years later I want to finish the job mostly due to personal pride! I have upgraded to Mavericks, and bought Beginning iOS6 Development. Do I upgrade Xcode to 4.x first, complete the book then upgrade to Xcode 5 or be brave and go straight to Xcode 5. Your advice would be greatly appreciated because my time now is more precious than when I first wrote the app.