A Los Angeles County coroner's report released Monday named the 26-year-old Miller's cause of death as "mixed toxicity," saying cocaine, alcohol and the powerful opioid fentanyl were found in his system.
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Paramedics found Miller unresponsive in his Los Angeles home on Sept. 7 and declared him dead soon after. An autopsy was performed Sept. 10.
SEE ALSO: Details reveal Mac Miller wrote a will years ago
Mac Miller wrote will years ago
The Pittsburgh native was in a two-year relationship with Ariana Grande that ended earlier this year.
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His music, which often examined his depression and drug use, won him fans among some of the biggest names in hip-hop.
Performers at a tribute concert for him last week included Chance the Rapper, Travis Scott and John Mayer.
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