Doesn&#x27;t the secure update mechanism simply permit access to the system partition? This late in the game, how can that possibly give Apple user filesystem keys? Those require the PIN or password. An OS update at this point can only permit rapid brute force iteration. Obviously &quot;unfettered access to the device&quot; is really useful to steal user keys while the device is unlocked, but it&#x27;s not so helpful after the fact.