You can download older versions of Xcode via https://developer.apple.com/downloads https://developer.apple.com/downloads — if you don’t care about shipping anyt

You can download older versions of Xcode via https://developer.apple.com/downloads https://developer.apple.com/downloads — if you don’t care about shipping anything to an Apple walled garden but just want to dig into some old software, definitely stay on an older version of OS X and grab an older copy of Xcode. EDIT: additionally, I’d recommend going for a version of Xcode as close to the version used for developing the software you’re interested in as possible — balancing out what version of Mac OS (you have / are targeting / most up to date) is compatible with the versions of Xcode close to it. Some major Xcode updates will break compilation and you’ll have to fix minor issues to move forward, which could be brutal in a larger codebase.