Compile Swift on 10.9?

Question

Until this afternoon, when I downloaded the final Xcode 6, I was able to play around with Swift on my 10.9 machine. Now I get this error:

OS X targets using Swift cannot be built against an SDK older than 10.10, but the effective SDK is 10.9.

I had saved my copy of Xcode 6B7, but now opening the project in that version also causes the same error.

Anyone have a fix? I do not want to install 10.10 on this machine.

Answer 1

Xcode 6.0 is only going to support using Swift with iOS. Using Swift with Mac OS X is not supported in this version of Xcode, and you will need to get Xcode 6.1 beta for that. Previous betas of Xcode 6.0 has support of Swift for OS X, but that was because Xcode 6.1 beta wasn't out at that time.

From the Xcode 6.0 release notes:

Swift Support for OS X

*A future version of Xcode to be released along with OS X Yosemite will add Swift support for OS X, including playgrounds and REPL. Xcode 6.0 only supports Swift for iOS projects and playgrounds. A beta release of Xcode with Swift support for both OS X and iOS is available at developer.apple.com/xcode/downloads/