Aún no disponemos de datos de J.G. MacMahon en la Base
Filmografía parcial 
| --<>-- | ||
| All -- Movies -- TVmovie-Video -- TV Episodes | ||
| - |  YOUNGER BROTHERS, THE (1949) ... Barman | |
| - | BLONDES AT WORK (1938) ... 3er. Reportero | |
| - | MURDER IN GREENWICH VILLAGE (1937) ... Camarero | |
