George Arthur Mackay (7 May 1906 â 7 May1981) was a rugby union player who represented Australia. He was born in Sydney, and attended Newington College (1919âÂÂ1922). Mackay was a fullback and claimed one international rugby cap for Australia in 1926. In later years he lived in Canberra and he died in Royal Canberra Hospital on his 75th birthday.