Almost no one. Total desktop sales have been drifting down for 2 years: http://images.macworld.com/images/news/graphics/143380-mac-units-q409_original.jpg http:

Almost no one. Total desktop sales have been drifting down for 2 years: http://images.macworld.com/images/news/graphics/143380-mac-units-q409_original.jpg http://images.macworld.com/images/news/graphics/143380-mac-u... Of the 800K desktops, over 600K were iMacs (no citation; sorry), and the average selling price was ~$1,250, meaning that Apple sold well under 100K Mac Pros. I would guess it's a ~250K unit/year business, shrinking slowly. They can probably keep swapping new processors into the existing design for years w/o significant R&D costs. My guess is high-end video-editing will keep it alive for some time.