Some users love the user interface changes in watchOS 10. Others do not. What changed, and how does Apple decide to update a perfectly good user interface, anyway? Former Apple engineer David Shayer explains what Apple changed and likely why, before sharing how Apple approaches major interface changes.

Ever wonder how much the Mac’s user interface has changed over time? Thanks to Stephen Hackett’s extensive collection of screenshots in each of the 15 versions of the Mac operating system, we can all trace the transition from Pin Stripes to Brushed Metal and relive the skeuomorphic excess of Rich Corinthian Leather.

Are contemporary computing interfaces making us crazy? Fast Company's Mark Wilson finds inner peace in the interface of the Mac operating system circa 1991.

Gmail, Google’s popular email service, has undergone a revamp that includes visual tweaks and a battery of new features, some focused on usability, others on security.