[2] McKinnon began acting as a child, mostly in European student and short films.
[2] McKinnon won the New Faces Award for Best Young Actress for her performance in Wach.
[4] She played Christiane in the 2021 television remake of Wir Kinder Vom Bahnhof Zoo.
[5] McKinnon made her Australian TV debut playing the lead role of Jo in the 2023 miniseries, Bad Behaviour, based on Rebecca Starford's memoir.
[2][6][7] She played Liv in the Amazon Prime original series, Silver and the Book of Dreams, based on Silber – Das erste Buch der Träume by Kerstin Gier.