Apple officially unveiled Mac OS 9 on October 23rd, 1999, the “last version of the ‘Classic’ Macintosh Operating System (Mac OS) released before being succeeded by Mac OS X.” What are your thoughts? Videos after the jump.

Upon introduction, Mac OS 9 was advertised as having “50 new features,” including 128-bit encryption capabilities and Sherlock 2. Codenamed Sonata and originally intended to debut as Mac OS 8.7, Mac OS 9 is considered by some the most functional version of the original Mac OS

[via Wikipedia]

Part 1

Part 2