Mac Millers music is difficult to classify into a single genre, as he experimented with different sounds and styles throughout his career. However, his music can be described as a blend of different sub-genres, including alternative hip hop, psychedelic, jazz rap, soul, synth wave, R&B, jazz, and funk. At the beginning of his career, he was mainly known for frat rap, but later transitioned into alt-rap. His last few albums featured him singing nearly as much as rapping, and incorporated genres such as R&B, jazz, and funk. Overall, Mac Millers music can be described as eclectic and genre-bending, as he often dismissed genre and meshed different styles together.