Mac Miller Lived As A Tragic Recluse In Months Leading Up To Death!

Mac Miller lived as a tragic recluse before his shocking apparent overdose death, RadarOnline.com has exclusively learned.

"Mac was a nice kid but was rarely seen outside," a source told RadarOnline.com.

Fans were shocked on Friday, Sept. 7, when news broke that the rapper's dead body was found in a bedroom at his Studio City, Calif. house!

Authorities had been alerted after a male friend called 911 from inside Miller's home.

"Immediate dispatch, cardiac arrest," was the call to first responders, but they were too late. Miller, 26, was pronounced dead at the scene.

Miller had allegedly been battling substance abuse problems since his high profile breakup from singer Ariana Grande in May. Sources told RadarOnline.com that Miller never got over the split, and watching Grande fall in love and get engaged quickly to comedian Pete Davidson allegedly pushed him over the edge.

As RadarOnline.com has previously reported, although Miller was reclusive, on Thursday night, a source said, "He had a party with lots of noise and commotion. Guests were coming in and out all night, making noise and breaking bottles out back."

The insider said people often came to Miller: "He always had shady characters coming over throughout the night, so when we saw people and heard noise, it wasn't out of the ordinary.