Xcode 15.3 Beta 3 was released on 13 Feb 2024 and requires macOS 14.0+.
It can be downloaded from https://download.developer.apple.com/Developer_Tools/Xcode_15.3_beta_3/Xcode_15.3_beta_3.xip.
Release notes are located at https://developer.apple.com/documentation/xcode-release-notes/xcode-15_3-release-notes.
The SDKs it contains are:
- iOS 17.4 (Build 21E5200b)
- macOS 14.4 (Build 23E5196c)
- tvOS 17.4 (Build 21L5212c)
- watchOS 10.4 (Build 21T5202c)
- visionOS 1.1 (Build 21O5188b)
The compilers it contains are:
- clang 15.0.0 (Build 1500.3.9.4)
- swift 5.10 (Build 5.10.0.13)