Alexander Macaulay Jabavu was born in 1889 in King William's Town, he was the second son of John Tengo Jabavu. After studying at Lovedale, he taught briefly, then on his father's death in 1921 took over Imvo Zabantsundu, which he edited until 1940. In about 1925 he joined the Industrial and Commercial Workers' Union of Clements Kadalie and soon became one of its vice-presidents. He was a treasurer of the Cape Native Voters' Convention, a founder and official of the Location Advisory Boards Congress, and from 1935 to 1937 a member of the executive committee of the All African Convention, of which his brother, D. D. T. Jabavu, was president. He served on the Ciskei Bunga and on the Natives' Representative Council for the rural areas of the Cape Province from 1937 to 1942. He died in 1946.