Developers I\'m supporting just got new Macs with XCode 6.2 (Version 6.2 (6C131e)).
In running xcodebuild we\'re having failures in running against any earlier version
Found the answer in this thread: xcode simulator not coming up - reinstall possible? (the accepted answer). Looks like xcode 6.2 is not "smart" enough to create the simulators on its own. This is why, if you update from 6.1 to 6.2, you won't be able to see ios 8.2 simulators even if you have the sdk, and the same reason why if you do a clean install you can't see any simulator at all, even if you specifically install the simulators in the preferences menu. Cheers for the poorly packaged official bundles!