- January 29: Michael Spindler becomes COO of Apple Computer.
- March 19: The Macintosh IIfx is released.
- May 7-11: The 1990 Worldwide Developers Conference is held in San Jose, California.
- October 15: The Macintosh Classic, LC, and IIsi are released.
- November: Michael Spindler becomes president of Apple Computer.
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