The $4,999 iMac Pro is aimed at video editors and virtual reality game developers, while the iMac, MacBook Pro and MacBook Air lineups get new Intel processors.
The most significant improvements are behind the scenes, but there's also better tracking protection and browsing performance in Safari, among other new features.
The Redmond, Wash., software giant is throwing a party close to and immediately after Apple's big shindig. Here's why this blatant bite into Apple is an effective tactic.