New apps were included as well, such as Mail, Address Book and TextEdit. OS X Cheetah also debuted the dock that still gives modern Macs their notable appearance.
Announced at the 2000 Macworld Expo in San Francisco, Mac OS X 10.0 introduced the new Aqua User Interface, which showcased title bars with a brushed metal look, brightly colored buttons on windows and photo-realistic icons.
There's also a peek at the upcoming macOS 'Monterey.' Cheetah IDG / AppleĪpple's first major OS X release, known as Cheetah, was a radical change from the previous Mac OS 9, Apple's Classic Operating System.
Here's a look at the progression of OS X from its debut in 2001 to the current version of macOS released in 2020.
