How to fix iTunes error 1600, 16.x.x when restoring with custom ipsw

If you have recently or ever tried to jailbreak your iDevice using pwnagetool or using any custom ipsw and encountered iTunes error 1600 on a mac this guide will help you. For mac users its really quite simple just open up redsn0w and instead of installing cydia, just check boot into pwned dfu mode. Once ur done with Redsn0w just open up iTunes and restore with that custom ipsw. This time it will work