Creator and Independent Producer of numerous award winning movies and long form drama series including: The Man In The High Castle a 40 hour long Amazon series which has become the cornerstone of the streaming network’s line-up, winner of two Primetime Emmy’s and many other awards. Quartet Dustin Hoffman’s directorial debut and Golden Globe nominee, starring Maggie Smith, The Invisible Woman Oscar nominated, starring and directed by Ralph Fiennes, the Emmy Award winning Peter and Wendy starring Stanley Tucci. The Miners winner of the Grierson Award, This Little Life BAFTA nominated and winner of the Dennis Potter, BANFF and RTS awards and Saboteurs the Prix Italia winning series.
Stewart studied at the Edinburgh College of Art and Royal College of Art in London and after graduating regularly contributed illustrations for The Times, Sunday Times, Oz, Nova, Time Out, , Spare Rib, Ambit and Management Today amongst many others. He also produced the artwork for the British TV movie The War Game and designs for the Royal Shakespeare Company. His work was featured in the Radical Illustrators magazine published by the Association of Illustrators in which co-editor George Snow singled out Mackinnon as “perhaps the greatest single influence on today’s Radical Illustrators.”
After being awarded a DAAD scholarship for his film Border Crossing he spent a year in Berlin before returning to the UK where he founded Trade Films which produced films and television such as The Miners' Campaign, Woodbine Place and Grierson Award winner, When the Dog Bites.
He was closely involved in devising the Workshop Declaration in partnership with Channel 4. The Workshops worked with their local communities, women's organisations and ethnic minority communities. So began a decade of experiment with progressive and aesthetically avant-garde documentaries and dramas screened on British television, which continued until 1990.
Stewart set up the Northern Film and Television Archive in the late 1990s and some years later co-founded the Northern Screen Commission with Sir Peter Carr, and Media Training Centre which provided courses for deaf students which was the first of its kind in the world.
In 2005 he founded Headline Pictures with the Head of BBC drama Mark Shivas and after delivering the fourth and final season of Man in the High Castle in 2020 founded Circle Pictures with US based Jere Sulivan with the aim of producing world class drama which explores the pressing issues of our times.