Xcode 11.0 Beta 1 was released on 3 Jun 2019 and requires macOS 10.14.4+.
It can be downloaded from https://download.developer.apple.com/WWDC_2019/Xcode_11_Beta/Xcode_11_Beta.xip.
Release notes are located at https://developer.apple.com/documentation/xcode_release_notes/xcode_11_beta_release_notes.
The SDKs it contains are:
- iOS 13.0 (Build 17A5492t)
- macOS 10.15 (Build 19A471t)
- tvOS 13.0 (Build 17J5485u)
- watchOS 6.0 (Build 17R5491t)
The compilers it contains are:
- clang 11.0.0 (Build 1100.0.20.17)
- swift 5.1 (Build 1100.0.38.29)