Will Meyers rebuilt Cheetah’s Aqua for the browser: the pinstriped title bars, the gel buttons that look wet, the Dock with its magnifying icons. It installs as @aqua-ui/web-components or @aqua-ui/react, so the lozenge tabs and barber-pole progress bars are working controls rather than screenshots. Best detail — the documentation site is itself a Mac OS X desktop, complete with a Macintosh HD icon and a cheetah.jpg preview window.