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
iOS 6 Beta 3 Released to Developers
The third Beta of iOS 6 has today been released to developers by Apple. The next generation mobile operating system, set for release “this fall” is expected to launch alongside the iPhone 5 sometime between August 7th and early October.
With only 3 weeks separating the release of Beta 2 and Beta 3, it seems apple is well and truly on the way to having there new operating system ready for the iPhone 5 launch!
Stay tuned for more information on this story as it develops!