The only likely member of their Test starting eleven missing from the warm-up match is opening batsman David Warner, who was captaining Australia's Twenty20 team in the final of a triangular tournament in Auckland, New Zealand, on Wednesday.
The South Africa A team includes five players with international experience.
The first of four Tests starts in Durban on March 1.
Teams:
South Africa A: Khaya Zondo (captain), Theunis de Bruyn, Zubayr Hamza, Beuran Hendricks, Pieter Malan, Wiaan Mulder, Senuran Muthusamy, Duanne Olivier, Rudi Second (wkt), Malusi Siboto, Shaun von Berg.