McCabe is an Associate Artist of the Royal Shakespeare Company (RSC), best known for his roles, ranging from comedy (Puck, Autolycus, Thersites, Apemantus) to drama (King John, Iago, Flamineo).
McCabe has also been associated with Chichester's Festival Theatre playing a range of contrasting roles including the title role in Scapino or The Trickster by Molière (Festival Theatre 2005), directed by Silviu Purcarete.