Andrew Jay Hertzfeld (born April 6, 1953) is an American software engineer who was a member of Apple Computer's original Macintosh development team during the 1980s.

In the early 1980s, he invited his high school friend, artist Susan Kare, to join Apple in order to help design what would become standard Macintosh icons.

[4] Hertzfeld was a member of the design team for the Apple Macintosh, which was conceived by human–computer interface expert Jef Raskin.

[5][6] After a shakeup in the Apple II team and Apple co-founder Steve Wozniak's brief departure from the company due to a plane crash,[7] co-founder Steve Jobs took control of the nearly two-year-old Macintosh team in February 1981 and added Hertzfeld to it at his request.

Working for Bud Tribble alongside Bill Atkinson and Burrell Smith, Hertzfeld became a primary software architect of the Macintosh Operating System, which was considered revolutionary in its use of the graphical user interface (GUI) where Raskin also made contributions.

[10] He volunteered for the Open Source Applications Foundation in 2002 and 2003, writing early prototypes of Chandler, their information manager.

[12] In early 2004, he started folklore.org, a Web site devoted to collective storytelling that contains dozens of anecdotes about the development of the original Macintosh.