Camera HalfTone - How can I demo in my MacBook?

my Macbook is unable to open the camera…any way I can test on my laptop?

thanks

If you remove the places where it says WhileEmpty, and also remove WhileCount, but keep the definition that is inside, and change this to the image you want <Image ux:Name="picture" File="Icons/background.png" StretchMode="UniformToFill" > you should be good to go.