I don't have a system stored on mine, so maybe that's why no probs. . .And yes, having been a victim of an earlier "update" which screwed up something for me, I understand your resentment for their having released the update "prematurely", but I know that they can't foresee every problem that people run into, because of the many different ways that we use our machines, to say nothing of all the different programs that our out there that may or may not be compatible with what they put out. I AM grateful, however, with how quickly they try and remedy the problems that we wind up with! That's one of the reasons that I love my Mac!