This tall, blond, blue-eyed Canadian saw his first play at twenty-one years of age. He attended Concordia University in Montreal and The London Academy Of Music And Dramatic Arts in London. He has appeared in numerous stage productions including the national tour of Neil Simon's "Biloxi Blues". Since 1989, MacKenzie has been a frequent guest on episodic TV, including Camryn Manheim's corrupt boyfriend on "The Practice.". He made his feature debut in the formula comedy "Dutch" (1991) opposite Ed O'Neill and has since gone on to do three Spike Lee films and "The Aviator" for Martin Scorsese, as well as many others. MacKenzie gained his greatest renown as Arnold Spivak, one of the ambitious lawyers, in Steven Bochco's drama series "Murder One" (1995). In 2000, he was cast as a regular on the sci-fi action series "Dark Angel." He loves politics and resides in New York City with his fiancee, the writer, Erin Cressida Wilson.