I'm trying to use Swift on Xcode 6 for an OS X application, but it defaults the language to Objective-C and won't let me switch it to Swift. I can use Swift for iOS but not OS X. I have the latest software so I'm not sure what the problem is. Can someone help?
The current version of Xcode doesn’t support Swift for OS X… yet.
The App Store update description says:
* NOTE: Swift support for OS X is coming in a future Xcode update
So you'll either have to download the beta version from http://developer.apple.com/xcode/downloads or wait for support to be added for the release channel.
Swift is currently supported by 2 versions "XCode Ver. 6.4" and the latest "XCode 7 Beta 2 Ver."
Download Either of them from http://developer.apple.com/xcode/downloads
XCode 6.4 Recommended as of now due to stable release.