hey when the update goes live does it have to be performed off the native computer for the devices ? i currently dont have a working desktop PC as the pump on my watercooling burned out so only have my macbook pro and my ipad and ip4 both are linked to the desktops library. Will i be able to perform the update off the itunes on my mbp without loss of data ? or will i have to wait until the desktop is repaired ? thanks guys !