Maurice & Mac, composed of Maurice McAlister and "Mac" McLauren Green, were an American soul duo active in the late 1960s. Known for their harmonious vocal style and poignant lyrics, they were a significant part of the Chicago soul scene. The duo is best remembered for their 1968 hit "You Left the Water Running," which has been covered by numerous artists, highlighting their influence on soul music. Despite their short-lived career, Maurice & Mac's contributions to soul music continue to resonate in contemporary music.