Some lessons learned when I upgraded AirKill from Cocos2D 0.8 to 3.0. If your game is on a very old version of Cocos2D, you’ll want to read through this to save you some time.
Implementing In-App Purchases for the Mac App Store
Did Apple rejected your app because it is a “trial version”? Are you looking to have an in-app purchase item in your Mac app? Read here to see the correct way to add in-app purchase items for the Mac App Store.