问题
i'v been looking to kick start my app development for the new iPad(iPad-3). But i could not find a place where i can download/update my XCode inorder to get the retina display simulator. Apple released XCode 4.3.1 with iOS 5.1 SDK. But that requires Mac OS 10.7.3(Lion). Is it mandatory for me to upgrade myself to Lion in order to start developing apps for the retina display iPad or can i get the same in Snow Leopard???
回答1:
I tried installing the same from Snow leopard and failed with error "Xcode can't be installed on Macintosh HD because Mac OS X version 10.7.3 or later is required."
So updated to Lion 10.7.3 and took Xcode 4.3.1 from Mac App Store which was released on 7th March 2012.
Yes, you have to upgrade to Lion.
回答2:
I am having the same issue and found this link that could be interesting: http://www.iphonedevsdk.com/forum/iphone-sdk-development/100229-snow-leopard-sdk-5-1-a.html
Not sure if you can submit your apps to the apple store when they are built this way.
来源：https://stackoverflow.com/questions/9679008/how-to-get-retina-display-ipad-simulator-in-xcode-4-2-mac-os-10-6-8-snow-loepa