Mac OS X 10.0 Cheetah

Initial commercial release of Mac OS X (after the Public Beta), notable for its early Aqua UI polish and performance issues that were largely addressed in later releases.

• Introduced the Aqua interface publicly.
• Missing some features (like DVD playback) at launch.
• Rapidly superseded by 10.1 (“Puma”) due to performance concerns.

• Puma
• macOS (overview)