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
Apple Announces Arthur Levinson as Chairman –
As of November 15th, Apple has put Arthur Levinson as the new Chairman for The Apple Corp. This means Arthur has took Steve job’s deceased place. Apple has also appointed Disney boss Robert Igoe to its board or directors. This has taken as good news to the apple stock shares as Apple stocks have gained up by 2.52% at $388.83 by 5:39 PM EST 11/15/2011. No word from both new appointed board members but a statement, we hope, is soon to follow.