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 Begin Selling Unlocked iPhone 5's Via Online Store
Apple have begun to sell their iPhone 5 Unlocked via there website this evening.
The unlocked iPhone is currently available from Apples online store for purchase today ready to be placed under your tree for Christmas day!
The delivery time is around 1 week on the unlocked iPhone 5 and it is also worth noting that your iPhone will not come with a aim card and you will have to contact your carrier for a nano sim. Unlocked iPhone 5’s should be available from your local Apple retail store later today but are also available to order online now.