Here it is, Ozymandias'—one of the Watchmen—computer: A Macintosh SE/30, all in black including the keyboard and mouse. One of the many Apple/Steve Jobs references in the movie (spoilers). Click to see the close-up.
The computer runs the classic Macintosh System in inverted video mode, white over black.
Update: VERY sorry for the spoilers. Took those out. – JC