Mac Miller died Friday of an apparent overdose … TMZ has learned.

Law enforcement sources tell TMZ … Mac was found Friday at around noon at his San Fernando Valley home and was pronounced dead at the scene.

Miller has had trouble recently with substance abuse … in the wake of his breakup with Ariana Grande. The rapper wrecked his G-Wagon by wrapping it around a utility pole back in May and was arrested for DUI and hit and run. He fled the scene but cops say he later confessed at his home. He blew 2 times the legal limit.

After his arrest Ariana tweeted, “Pls take care of yourself” and was clearly concerned about substance abuse.

After their breakup, Ariana made it clear … his substance abuse had be a deal breaker in their 2-year relationship.

His 2014 mixtape, “Faces,” was almost autobiographical on the subject of drug use. There were also references to premature death.

A profile of Mac was just published Thursday by Vulture — among other things, Mac said he had enormous pressure growing up in the public eye … “A lot of times in my life I’ve put this pressure to hold myself to the standard of whatever I thought I was supposed to be, or how I was supposed to be perceived. And it creates pressure.”

Thursday night Mac posted video of a record player and you hear his song, “So it Goes,” which includes lyrics, “Nine lives, never, die, f*** a heaven, I’m still gettin’ high.”

Mac was supposed to start a tour next month.

Story developing …

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