Sathyandranath Ragunanan "Mac" Maharaj (born 22 April 1935 in Newcastle, KwaZulu-Natal, South Africa) is a South African politician affiliated to the African National Congress, academic and businessman of Indian origin.
Maharaj was a political activist who worked closely on anti-apartheid activities with Nelson Mandela, with whom he was incarcerated following the Little Rivonia Trial on Robben Island. A member of the South African Communist Party,  in prison he secretly transcribed Mandela's memoir Long Walk to Freedom and smuggled it out of the prison in 1976.
From 1988 to 1990 he commanded Operation Vula, an underground program of armed resistance.
He was democratic South Africa's first Minister of Transport, a post he took on 11 May 1994 and kept until 1999.
In 2005 he joined the faculty of Bennington College in Vermont, USA.