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 iPhone 5 Has Already Been Jailbroken
The well known hacker @chpwn has today confirmed that work has started on the iPhone 5 just hours after public release.
The jailbreak for the iPhone 5 is no were near public release and you can expect it in the coming months but it is always good to nowhere has started.