Xcode 6.2 Release was released on 9 Mar 2015 and requires macOS 10.9.4+.
It can be downloaded from https://download.developer.apple.com/Developer_Tools/Xcode_6.2/Xcode_6.2.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-SW412.
The SDKs it contains are:
- iOS 12D508
- macOS 13F26
- macOS 14A383
The compilers it contains are:
- clang 6.0 (Build 600.0.57)
- swift 1.1 (Build 600.0.57.4)
- LLVM-GCC 3.5 (Build )