Is is possible to code using Swift on OS X Mavericks? I found the manual on iBooks but that's as far as I can get right now.
The final XCode 6 has released and is available in the App Store. (to be precise, I'm talking about
Version 6.0.1 (6A317)).
I was surprised to see that (in contrast to XCode 6 beta) it does support Swift only for iOS! (Look at this screenshot, this is what I see when trying to create a Swift playground; also, Swift can be choosed as a language for iOS project, but not for OS X project)