[TheTimeTraveler]

Yes, this is a legit and important patch.

I did mine myself last night at 8:00 pm however I believe that most other users had theirs done automatically overnight (assuming they were plugged into a power source).

If you use Apple products then do check to be sure your iPhone, iPad, laptop and desktop have all been done. Be sure to be plugged into a power source if you find it has not been done.