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
The iPhone 4S Cost's Only ?112.89 To Make & Blame Your Battery Issues On The ?3.68 Battery –
For all of you which believe that Apple products are high priced because of the hardware used well you are wrong , The image above shows the price for each part of the iPhone 4s which will shock a lot of people. We have new that Apple has been making a healthy profit from the iPhone after having a very low market share but has the biggest profit. The total cost for the parts of an iPhone 4s total to a shocking ?112.89 that means for us that bought the iPhone 4s out of contract for ?499.99 have give Apple a profit of ?386.11. It is worth bearing in mind that this cost is just for the parts and not for packaging , product development and even product assembly. Another pointer to make is that there is no cost included in the ?112.89 for the IOS , which has thousands of people working on it and developing it every day.