Kammala jumla mai zuwa: Munster an zana shi a cikin rukunin farko na Heineken Cup na 2011-12, tare da Northampton Saints, Scarlets da Castres. Sun doke Northampton 23 zuwa 21 a wasan farko na pool a Thomond Park, bayan da aka zira kwallo a minti na 83 daga Ronan O'Gara. A wasan su na biyu na pool, Munster ya doke Castres 24 zuwa 27, tare da O'Gara ya sake zira kwallaye a cikin karin lokaci don tabbatar da nasara. Munster ya lashe wasan biliyan na uku, ya tafi Scarlets, 17 zuwa 14. A wasan dawowa mako guda bayan haka, Munster ya ci nasara 19<unk>13. Nasarar 26<unk>10 a kan Castres a ranar 14 ga Janairu 2012 ta tabbatar da cewa Munster ya cancanci zuwa wasan kusa da na karshe na gasar cin kofin Heineken na 2011 <unk> 12. Munster ya ƙare gasar cin kofin Heineken Cup ta 2011-12 tare da nasara 51-36 a kan Northampton Saints, yana tabbatar da saman iri a wasan kusa da na karshe kuma ya lashe 6 daga cikin wasannin pool 6 a karon farko. Munster sun rasa wasan kusa da na karshe da Ulster 22<unk>16, sun rasa wasan su na biyu a gida a Heineken Cup. Munster ya gama na uku a cikin
2011<unk>12 Pro12, kuma ya buga Ospreys a cikin wasan kusa da na kusa, ya rasa 45<unk>10. An sanar a ranar 22 ga Fabrairun 2012 cewa McGahan zai bar Munster a ƙarshen kakar 2011-12 don ɗaukar matsayin mai horar da mai ba da horo a ƙungiyar gudanarwa ta Ostiraliya. An zabi Rob Penney, kocin Canterbury da New Zealand U20, don maye gurbin McGahan, wanda aka bayyana a matsayin kocin Munster na gaba a ranar 2 ga Mayu 2012.