I've installed Xcode 4.6 beta (which includes iOS 6.1 beta SDK) but do not wish to install iOS 6.1 on my (development) iPhone quite yet. What I'd rather do is continue developing with iOS 6.0.2 (or use the iPhone simulator instead).
Hence I've tried to download and install iOS 6.0.2 into XCode 4.6: indeed in its Organizer window both iOS 6.1 (by default) and iOS 6.0.2 (by this action) now do show up. However when I try to change the base SDK for my project (under its Build Settings) Xcode still seems unaware of the second choice: The only iOS-related choices available are iOS 6.1 and Latest iOS (i.e. again iOS 6.1).
How do I add (the installed) iOS 6.0.2 SDK to that list so I can select it as base SDK for my project?
P.S. My current understanding that this is different from that other (frequent) question.
P.S.S. Presumably nothing of this is specific to Xcode 4.6 as opposed earlier versions. Therefore I feel authorized to mention it even outside the confidentiality agreement, for its existence as such is clearly publicly known.