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
Live Video Coverage – September 12th iPhone 5 & iPad Mini Keynote
As you are most likely well aware Apple is set to hold a Apple keynote on September 12th 2012. We will be covering the event live and you can find all the relevant information here as it happens. We will be updating this pages as we receive more and more details about the event and also very soon we will be adding our Live blog and Live video stream.