Macdonald High School (also known as Mac) is an English-language public high school run by principal Kathleen O’Reilly in Sainte-Anne-de-Bellevue Quebec, Canada. It has about 1,000 students and is administered by the Lester B. Pearson School Board. It first opened in the year 1907.On May 18–20, 2007, the school's alumni association celebrated the institution's centenary with a gala three-day event complete with dances, open houses, and a commemorative ceremony.