iPhone 4s OTA downgrade to iOS 6.1.3 by ThatiPodGuru June 6, 2022, 7:28 pm 1.7k Views You at least need mac os high sierra or newer The methods used In this video are linked down below ipsw: OTA Downgrader: https://github.com/LukeZGD/iOS-OTA-Downgrader/wiki/How-to-Use Share this: See more Previous article Hallmark Movie Checklist Next article Apple Watch Series 3 continues to be sold even if watchOS 9 is not supported