Deeper into the Paradigm  

The screen may be flat, but the illusion of depth grows stronger. With Apple’s new operating system, OS X, the evolutionary trend of the user interface becomes clear. Starting as flat, monochromatic symbols, the Mac’s icons have become progressively more naturalistic, and the suggestion of depth created by layers of overlapping windows has been enhanced, first by the Classic bas-relief shading on the window frames, and now, with Aqua, the OS X interface, by the addition of feathered drop shadows cast by the windows.

Shinn, Nick. ShinnType (2002). Design>User Interface>Operating Systems>Macintosh

Top Ten Nine Reasons the Apple Dock Still Sucks

Apple Sales is apparently in love with the Dock. You can't go into an Apple store without seeing it splayed across the bottom of the screen, in the very configuration least conducive to computing on a Macintosh. Why? Because it's sexy and it sells. Unfortunately, as a productivity device, it just doesn't work.

Tognazzini, Bruce. Nielsen Norman Group (2004). Design>User Interface>Operating Systems>Macintosh