Jeff MacKay was born on October 20, 1948 in Dallas, Texas, USA as Jeffery Neill MacKay. He was an actor, known for Magnum, P.I. (1980), All the President's Men (1976) and JAG (1995). He died on August 22, 2008 in Tulsa, Oklahoma, USA. Jeff MacKay was born on October 20, 1948 in Dallas, Texas, USA as Jeffery Neill MacKay. He was an actor, known for Magnum, P.I. (1980), All the President's Men (1976) and JAG (1995). He died on August 22, 2008 in Tulsa, Oklahoma, USA.