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      Do Swift-based applications work on OS X 10.9/iOS 7 and lower?

      up vote 14 down vote

      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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      2 Answers

      up vote 4 down vote accept

      Swift code can be deployed to OS X 10.9 and iOS 7.0. It will usually crash at launch on older OS versions.

      up vote 3 down vote

      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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      Do Swift-based applications work on OS X 10.9/iOS 7 and lower?

      up vote 14 down vote

      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.

      Or what should I have to create a Swift application using Mac OS?


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      up vote 9 down vote

      Swift code can be deployed to OS X 10.9 and iOS 7.0. It will usually crash at launch on older OS versions.

      edit

      Swift sets some bits in the Objective-C metadata to mark Swift classes. libobjc in OS X 10.9 and iOS 7.0 was changed to ignore these bits in preparation for Swift's arrival. Older OS versions will be confused by these bits. - Greg Parker Jun 21 '14 at 1:05

      add a comment


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