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
Online Apple Store Updated For Fathers Day
The online Apple store was down for maintenance earlier this morning but is now back online with an updated homepage with Father’s Day promotion.The main promotion on the homepage is for the both the iPad and the iPad mini and promotes the free engraving option available. The promotion also showcases an extensive range of other suitable gifts from as well as suggesting a range of alternative gift suggestions ranging from the Nike Fuel band to GoPro HD Hero 3.
Apple also points out that if you defiantly want to make sure you get your Fathers day order on time then be sure to check the shipping deadlines here.