[12] In September 2020, St Mirren stated they had rejected a "substantial" offer for Magennis from Hibernian.

[14][15] On 1 August 2021, Magennis scored Hibernian's opening Scottish Premiership goal for the 2021–22 season against Motherwell which ended in a 3–2 victory for Hibs.

[16] Magennis had a good start to the 2021–22 season, but then missed most of it due to groin and knee injuries.

[17] After he suffered from more injury problems during the 2022–23 season, Magennis was allowed to leave Hibs in June 2023.

[18] Magennis was selected for the Scotland under-20 squad in the 2017 Toulon Tournament,[19] in which they won the bronze medal.