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
iPhone 5 and iPad Mini Coming In Two Separate Apple Events
Rumor’s have been suggesting for the last few months that Apple will show off both the next generation iPhone 5 and the long awaited iPad Mini at an event on September 12th , but today John Gruber has commented saying that he believes Apple will hold an event on September 12th focusing mainly on the iPhone 5 and iOS 6. The iPhone 5 is then expected to ship 9 days later which will keep the hype up for Apple with reviews of the next generation iPhone. Regarding the iPad Mini event Gruber believes we will see Apple hold a second event in either the first or second week of October.