Introduction of Macintosh II and AppleColor RGB Monitor

Apple officially unveiled the Macintosh II, its first open-architecture Mac, alongside the AppleColor RGB Monitor. This marked the Mac's official entry into the world of color computing, allowing users to experience 256 colors from a palette of 16.7 million.

Significance

This event was monumental, breaking the Mac's monochrome barrier and opening it up to a vast array of professional applications previously dominated by expensive workstations or less intuitive PC platforms. It cemented the Mac's place in creative industries.