Mac, who met 18-year-old Bobby Stewart in December when he donated $50,000 to the Make-A-Wish Foundation, joined him at ID Labs to cut a collaborative track.
"To be with Mac is a blessing. He’s lyrically amazing,” said Stewart. “Hip hop is my passion. So to be able to be with Mac Miller, who’s a Pittsburgh legend... Wiz Khalifa shoutout."
"Feeling like your music really does something for the world makes it all worth it, no matter what," added Mac. "From now on, no matter what happens for the rest of my life, no one can take that away from me."