22 million OS X users. 67% (15 million) run Tiger, 23% run Panther.“Final look at Leopard before it ships in October.”Leopard: 300 new features, showing ten. New desktop: Transparent menu bar. New Dock (no details).Stacks cleans up desktop. Uses Core Animation. Folders in dock that open rapidly to show their contents. Fans out in single column or shows content thumbnails in pop-up shaded area (no window chrome).Stacks makes Finder looks optional! 3-D sliver pedestal under dock shows real-time reflections of window content that passes behind it.New pop-up icon in Safari for one-click download, goes to Downloads stack in Stacks. Software Development