Will Swift-based applications work on OS X 10.9 (Mavericks)/iOS 7 and lower?
For example, I have a machine running OS X 10.8 (Mountain Lion), and I am wondering if an application I write in Swift will run on it.
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Swift code can be deployed to OS X 10.9 and iOS 7.0. It will usually crash at launch on older OS versions.
Apple has announced that Swift apps will be backward compatible with iOS 7 and OS X Mavericks. The WWDC app is written in Swift.
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