Much of Rhapsody ended up becoming Apple's Mac OS X Server, designed to offer some of the same features of Mac OS X but intended to run on corporate servers. In January 2000, Jobs previewed an early version of Mac OS X publicly for the first time before a crowd at Macworld Expo in San Francisco. He showed off a number of new graphical features, most notably a revamped version of the main Finder program as well as the Dock, a new toolbar that sits at the bottom of the screen. Far from just another software feature, the Dock is emblematic of Apple's trademark elegant design and the enormous engineering resources it is willing to devote to every detail. If a video is minimized to the Dock, it continues playing.
Photographs visibly shrink into the Dock, like a genie entering a bottle.
Items on the Dock can also be made minuscule, only to be magnified as the cursor passes over them. While demonstrations of Mac OS X at various Apple events last year drew audible praise from the crowds, Mac loyalists also complained that the new software was not Mac-like enough. Apple also decided that it needed more feedback. Four months later Jobs set March 24 as the release date for the final version 1.0. Tarter considers the whole project a lesson in managing an upgrade.