How can I reproduce this magnification effect for my own screen shots? Does anyone know how to make the great-looking magnifying glass, shown in Apple's image, shown below? I really like the shadow! I'd love to know what software Apple uses for this.
In Preview you can now add shadowed magnification. I think this was new in El Capitain. But it is not the same shadow. My guess is that effect is produced in Quartz Composer (if they want to "eat their own dog food").

See interface: