Old versions of Mac OS X used to play welcome videos during the installation process.

These helped set the stage for the new operating system.

Cheetah, Puma and Jaguar shared a video that highlighted the new Aqua interface. Panther's featured the bright blue background with nice, crisp, white text. Tiger brought Spotlight, and as such, the welcome message was highlighted by a moving light. Leopard and Snow Leopard shared a darker clip that is reminiscent of the initial Time Machine interface.

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