Xcode 7.2 Release was released on 8 Dec 2015 and requires macOS 10.10.5+.
It can be downloaded from https://download.developer.apple.com/Developer_Tools/Xcode_7.2/Xcode_7.2.dmg.
Release notes are located at https://developer.apple.com/library/content/releasenotes/DeveloperTools/RN-Xcode/Chapters/Introduction.html#//apple_ref/doc/uid/TP40001051-CH1-SW270.
The SDKs it contains are:
- iOS 13C75
- macOS 15C43
- tvOS 13U78
- watchOS 13S660
The compilers it contains are:
- clang 7.0.2 (Build 700.1.81)
- swift 2.1.1 (Build 700.1.101.15)
- LLVM-GCC 3.7.0 (Build )