He is best known for playing Jimmy Shepherd, a main character on the Fox comedy series The Mick.
After offering the role to MacArthur, Fox re-shot the pilot prior to the series debut.
[1] MacArthur has also appeared in films, such as The Diabolical (2015) and Answers to Nothing (2011), as well as numerous guest roles on television.
[5] MacArthur appeared in a recurring role in The Righteous Gemstones as Scotty "the Devil", a moronic stuntman turned extortionist.
[6] In September 2024, he was cast in a recurring role on the upcoming superhero series Spider-Noir.