Happy Mac, the smiling icon that for 18 years greeted Apple computer users when they started up their machines, is dead. A staid Apple logo illustrated in self-possessed shades of gray has replaced the eager-to-please icon in the new Jaguar version of the Macintosh operating system. But Apple refuses to comment on why Happy Mac was killed, or on what icons may have replaced Happy Mac's more sober brethren -- Sad Mac and Dead Mac. Macs used to display a Sad Mac, a non-smiling icon, to indicate that the machine was experiencing serious hardware issues. Even worse was Dead Mac, a Sad Mac icon that appeared on an all-black background accompanied by the "Chimes of Doom" sound. Since Apple has chosen not to comment on the fate of any of the anthropomorphic Mac icons, serious and silly speculation is running rampant. Some suggested that Happy Mac was laid off in a cost-cutting move, and is currently "between jobs" -- a reference to the widespread belief that Steve Jobs, Apple's CEO, should be charged with Happy Mac's homicide. Happy Mac was jettisoned to appease the aesthetics of Steve Jobs who has wanted for a long time to dump the "smirking symbol," sources close to Apple programmers confirmed. But some Mac users believe Happy Mac was the perfect personification of the personality of their beloved computers.