In this tutorial, we learn how to create Apple's aqua wallpaper in Photoshop. First, create a new canvas in the dimensions you choose. Now, go to the paint pallet and choose a color. Click on ok, then start to paint your background. Select the pen tool, then draw a line from left the right on the canvas. Now, change the color of this shape to white. Now, change the fill of the layer to 10-30%. Now, double click on the layer and make the stroke white and add a drop shadow to 40 pixels and 20% opacity. Also, change the inner glow to white and change the opacity to 10%. After this, add a new layer and select both layers, then click merge layers. After this, select a gradient tool and fade out the edges. Repeat this once more, and when finished you will have wallpaper in no time.