Xcode on my Mac Sierra (10.12.6) Rumi, March 14, 2019 You can get the correct version here at this URL: https://developer.apple.com/download/more/ to download a your version of Xcode you want. Specifically, get 9.2.1. This is the recent version that works with mac OS Sierra. Alternatively, this link works good too- https://xcodereleases.com/ Networking AppleMacSierraxCode