Do I need to install Yosemite in order to build a Swift iOS app?

Question

I would like to try building a swift app, but I am afraid to upgrade my Mac to Yosemite Developer Preview. I am not clear if this is a prerequisite.

Answer 1

Just to get the official source in here, the Xcode 6 Beta 1 Release Notes state:

Xcode 6 Beta requires a Mac running OS X version 10.9.3 (or later) or 10.10.

And Xcode 6 comes bundled with Swift.

Answer 2

It's not a prerequisite. You can install the XCode 6 beta which includes swift support as long as you have the newest version of Mavericks (10.9.3)

Answer 3

否。我使用的是Mavericks（10.9.3），Xcode6 beta运行良好，内置程序也运行良好。