I was 2.5 years old when my brother was born and I remember a lot about that night - being at home with my nan, what our curtains were like, how the room was laid out. What the hospital was like, the toy I was given, the fruit jellies that someone gave my mum. Everyone's always been surprised that I remember so much.
You can't use that unless you're running Mountain Lion and you can only submit apps to the store with a released version of Xcode. The new syntax is amazing though!
When I've done similar upgrades, I've often found it quicker to have the previous code available to me in another checked out repo rather than switch branches and have to deal with any possible uncommitted changes issues.
