Cheetah 03 / 2001 – OS X 10.0 The history of macOS started with a bear, not a cat: in September of 2000, Apple presented Kodiak. For 30$, users could purchase this first public Beta of Mac OS X. The official OS 10.0, Cheetah, followed 6 months later. It featured Apple's brand new user interface Aqua and the first versions of apps like TextEdit, Preview, Mail, and QuickTime. The new OS X demanded a
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