In March 2015 national coach Susan Ronan gave McCabe a senior debut against Hungary at the 2015 Istria Cup, a 1–1 draw. A quad injury kept McCabe out of Ireland's 3–0 UEFA Women's Euro 2017 qualifying defeat by ESP on 26 November 2015 at Tallaght Stadium, Dublin. At the 2016 Cyprus Cup, McCabe scored her first international goal to secure a 1–1 draw with Italy.