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 iWatch Design Concept Shares Similarities With Nike Fuel Band
Todd Hamilton a UI design from San Francisco has used his spare time over the holidays to come up with the concept designs below for the Apple iWatch which is rumoured to be coming later this year.
Hamilton took inspiration from earlier designs by Thomas Bogner who mashed together the Nike Fuel band and iOS but there was some obvious flaws and it just looked to similar to the actual Nike Fuel band.
Todd Hamilton said in his blog post:
I wanted to retain a slim form factor like the Fuelband and incorporate familiar UI components from iOS 7. It needed to feel natural on the wrist and look like something Apple would actually produce.
Todd was not only thinking of the design but also the button functionalities as he states the iWatch should have one button on the left side which would act as the home button and 2 buttons on the right hand side for the volume controls.