Apponyi was born on 4 July 1949 in a refugee camp in Dachau, near Munich, migrating to Australia during infancy. His father Albert Frederick (Frigyes) Apponyi claimed descent from an illegitimate line of the Apponyi family.[1]
The family moved to Adelaide, and Apponyi had a difficult home life. He started wood carving when he was about five years old. He attended Woodville High School, where he was encouraged to apply for a scholarship to art school.[1]
Since then he has had one-man shows and group exhibitions locally, interstate and overseas. He has won several prizes, accepted commissions, conducted workshops in Australia and Malaysia, and studied wood-block printmaking under a Japanese master. His work is featured in many private collections both here and overseas and in public spaces across Australia.[1]
Goulburn architect Garry Dutaillis designed the frame; Apponyi fleshed out the shape with rods, and Adelaide builder Glyn Sennar and his crew of concreters applied the skin and cement coat.[1]
Jenny Palmer (March 2000). "Full transcript of an interview with Silvio Apponyi"(PDF). J.D. Somerville Oral History Collection (OH 562). State Library of South Australia. Retrieved 8 June 2020. For the Eminent Australians Oral History Project