Jef Raskin founded the Macintosh project at Apple, which led to the development of the Apple Mac and the popularisation of the graphical user-interface. He was Apple employee #31 and left the Macintosh team in mid-1981 after Steve Jobs took over the project. Jason Walsh: Before the Mac you were a professor of music. As a musician you presumably appreciate complex but specific tools for use by virtuosos. Your major contribution to computing, the Macintosh, seems to point in the other direction –.