Administered by the Basilian Fathers, it is the largest school of its kind in Canada, with an enrolment of approximately 750 students from grades 7 to 12.

After several years of operation and a change in the French laws, ten priests serving there openly bound themselves into a religious community.

In the years after World War II, it became apparent that the Bay Street buildings were not equal to the challenge of serving a growing student body.

In September 1950, St. Michael's College School opened its doors at Bathurst Street and St. Clair Avenue, where it is situated today.

In September 1985, the Basilian Fathers decided to refuse provincial aid beyond and return St. Michael's to its roots as an independent, Catholic high school.

The school's campus is located at Bathurst Street and St. Clair Avenue at the edge of Toronto's Forest Hill neighbourhood.

Its most recognizable features are the distinctive chapel tower and yellow brickwork, similar to Cormier's earlier work at the Université de Montréal.

The additions contain classrooms tailored to the science, art and music programmes, a substantial lecture hall, several computer laboratories, and a large library.

Renamed in honour of its benefactor, billionaire alumnus Eugene Melnyk, it features an artificial turf field, a rubberized running track, and lighting for evening events.

[9] From the Majors, there are twelve Hockey Hall of Fame inductees: Bobby Bauer, Turk Broda, Gerry Cheevers, Dick Duff, Tim Horton, Red Kelly, Dave Keon, Ted Lindsay, Frank Mahovlich, Joe Primeau, Murray Costello, and Jim Gregory.

[10] Additionally, Hall of Famer Reg Noble played for St. Michael's before the team adopted the Majors name.

[11] The school's flagship hockey team, the Toronto St. Michael's Majors, won the Memorial Cup four times before ceasing operation in 1961.

The 1993 Vanier Cup Champion University of Toronto Varsity Blues had several SMCS Alumni: Christopher Tyndorf, Lou Tiro and Peter Woo.

[18][19][20] arresting 6 students and with principal Greg Reeves and school president Father Jefferson Thompson resigning the same month.

[21] One of the two victims of the October 2018 incidents went on to file a C$1.65 million lawsuit against the school, its board, 3 former students, the Basilian Fathers, some coaches and some administrators.