Edit: After half day, my wife’s Mac started having the same problem. I have then applied the solution that I found in the Apple
Tim Cook Confirmed To Be Opening-night Speaker At D10 Conference –
All things D today announced that they have secured CEO of Apple Tim Cook to speak on the opening night at the D10 conference this year. This will be Tim Cooks first event on stage which is not an Apple event since becoming CEO last year.
Walt Mossberg and I could not be more thrilled to announce that Tim Cook, CEO of Apple, will be the opening-night speaker at our 10th D: All Things Digital conference.