In the mid-1980s he designed the Apple Desktop Bus, a proprietary bit-serial peripheral bus that became the basis of all Macintosh and NeXT computer models.

Starting in the mid-1980s, as the Macintosh experienced slow but steady growth, Apple's corporate leadership, including Steve Jobs, increasingly disrespected its flagship cash cow Apple II series—and Wozniak along with it.
The Apple II division—other than Wozniak—was not invited to the Macintosh introduction event, and Wozniak was seen kicking the dirt in the parking lot.
Although Apple II products provided about 85% of Apple's sales in early 1985, the company's January 1985 annual meeting did not mention the Apple II division or its employees, a typical situation that frustrated Wozniak.
In the mid-1980s he designed the Apple Desktop Bus, a proprietary bit-serial peripheral bus that became the basis of all Macintosh and NeXT computer models.
Starting in the mid-1980s, as the Macintosh experienced slow but steady growth, Apple's corporate leadership, including Steve Jobs, increasingly disrespected its flagship cash cow Apple II series—and Wozniak along with it. The Apple II division—other than Wozniak—was not invited to the Macintosh introduction event, and Wozniak was seen kicking the dirt in the parking lot. Although Apple II products provided about 85% of Apple's sales in early 1985, the company's January 1985 annual meeting did not mention the Apple II division or its employees, a typical situation that frustrated Wozniak.
Steve Wozniak