Learn how to design apple desktop theme in this tutorial.

Create a new file that would have 1280x1024px and 72 dpi. Applying the Paint Bucket Tool (G), paint it in black color.

Next we have to choose the Brush Tool (B), having the Opacity of 40% and white color to represent a flare on the lowest part of the picture.

Select the Ellipse Tool (U) now and draw a kind of sphere above the flare.

Fill 0% on the layers.
Blending Options-Inner Shadow

Blending Options-Gradient Overlay

Gradient’s parameters: