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 Sell Out WWDC 2012 In Less Then 2 hours –
Better luck next time.
Apple announced WWDC 2012 earlier today and then 2 hours later Apple announced they have sold out of tickets. Last year it took around 12 hours to sell out of tickets which are not cheap and cost $1,599 each. Tickets were limited to one per person, or five per organization, and are non-transferable and non-refundable.
We will have live coverage of the full event here on www.MacReviews.com/WWDC
WWDC 2012 Live