Xcode 8.0 beta requires a Mac running macOS 10.11.4 or later.
Xcode 8.0 beta includes SDKs for iOS 10.0, watchOS 3.0, macOS version 10.12, and tvOS 10.0. To develop apps targeting prior OS versions, see “About SDKs and the Simulator” in What's New in Xcode, available on developer.apple.com or, select Help > What's New in Xcode when running Xcode.
Xcode 8 beta can coexist with previous versions of Xcode. Prerelease versions of Xcode are made available from developer.apple.com to authorized seed developers, packaged in a compressed XIP file. To install Xcode during the beta period, download the XIP file, double-click the file to expand it in place, then drag Xcode.app to the Applications folder. Upon final release, Xcode is installed via the Mac App Store
Developers can download Xcode 8 from the link below. Please follow iClarified on Twitter, Facebook, Google+, or RSS for updates.