[smackfu]

I'm pretty sure the simulator that devs use supports the Retina iPad, and was available before release date. The tricky bit is that the Retina iPad is higher resolution that most people's desktops, so simulation becomes difficult.

[frankus]

I saw a tweet from him the other day saying he's got a 2650x1600 display (HP ZR20W, I believe). So that just barely fits.

The simulator now scrolls, however, so you could in theory test retina iPad apps full size in portrait mode on an 11" MacBook Air.

My 27" iMac (2650x1440) isn't quite tall enough even in landscape mode, but it's not unusable thanks to the scrolling.

[dunham]

I think the issue is pretty subtle, since it works when compiled with the new XCode and the Retina simulator comes with the new XCode. So if he downloaded XCode and ran his existing code base on it, it would look like it works fine.