Recently, I needed to test the behavior of some really awesome code (for Bushel) during a major iOS upgrade process (after all, you want to know your stuff works with every version of OS X!). The device was running the latest version of iOS and we needed to use an ipsw to load a specific version of the OS. This task isn’t as obvious as it might seem to be.
Learn To Upgrade iOS Manually Using iTunes Via An ripsaw Here…