Xcode 15.3 RC 2 was released on 4 Mar 2024 and requires macOS 14.0+.
It can be downloaded from https://download.developer.apple.com/Developer_Tools/Xcode_15.3_Release_Candidate_2/Xcode_15.3_Release_Candidate_2.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 21E210)
- macOS 14.4 (Build 23E208)
- tvOS 17.4 (Build 21L224)
- watchOS 10.4 (Build 21T214)
- visionOS 1.1 (Build 21O200)
The compilers it contains are:
- clang 15.0.0 (Build 1500.3.9.4)
- swift 5.10 (Build 5.10.0.13)