• Tony Mackle (1946-2024)art historian and curator; author • Aidan MacNaughtonguitarist; member of New Zealand heavy metal band Forsaken Age •
Thomas MahoneyAuckland architect (St Peter's School) •
William MahoneyAuckland's first New-Zealand-born priest (St Peter's School) •
Kevin Malloyinternational chief executive, Starcom MediaVest Group (SMG) (advertising) •
Jack Manning(1928–2021), New Zealand architect, designer of AMP Building, Auckland (1962) and the Majestic Centre, Wellington (1991) and many other buildings; awarded the New Zealand Institute of Architects (NZIA) Gold Medal 2011 •
Bernie McCahillrugby union player; played with the All Blacks •
Sean McCahillrugby union player; represented Ireland •
Sam McCarthyguitarist and vocalist; member of duo Kids of 88; member of Incursa, a St Peter's College band which won the Smokefreerockquest in 2004 •
David Keith McGillVUW, writer and publisher, journalist, former chair of Amnesty International Aotearoa New Zealand; also educated at Holy Name Seminary •
Denzil Meulipriest of the Diocese of Auckland; lawyer, writer, former editor of the
Zealandia and a leading New Zealand traditionalist Catholic •
Constant MewsProfessor of Medieval Thought and Director, Centre for Studies in Religion and Theology, Monash University •
Douglas Mewsmusician, academic, performer, conductor •
Bradley Moni Mikarugby union player; played with the All Blacks, Auckland, Blues and Crusaders •
Dylan Mikarugby union player; played with the All Blacks •
Lisati Milo-Harrisrugby union player; member of the Chiefs in Super Rugby •
Anthony Molloy lawyer, tax and trust law expert, author, editor, winegrower •
Joe Moodabeoperator of the large cinema chain Amalgamated Theatres, and other cinema enterprises •
Michael Moodabeoperator of the large cinema chain Amalgamated Theatres, and other cinema enterprises •
Royce Moodabeoperator of the large cinema chain Amalgamated Theatres, and other cinema enterprises •
Michael Morrisseypoet and fiction writer • Lt. Col. (rtd.)
Christopher Mullane New Zealand army officer •
Peter Mussonbassoonist ==N==