 Mac Marcoux was born on 20 June 1997 in Haviland Bay , Ontario . He resides there with his parents and two siblings , an older brother and a younger sister . He started skiing at the age of four . He also rode BMX bikes and raced go @-@ karts . In 2006 , he started losing his sight due to Stargardt disease , a degenerative condition , and became legally blind in 2007 . He said : " We 've always been a racing family from the beginning . It 's how I 've grown up . Going fast was just a part of it . The faster you go the more fun it is " . 
