Police and paramedics found Miller unresponsive at his home in Los Angeles and declared him dead shortly before noon, coroner's spokeswoman Sarah Ardalani said.
Miller - whose real name is Malcolm McCormick - dated Ariana Grande for almost two years, before they split in May and she is said to be devastated by Miller's death.
Mac Miller performs at Camp Flog Gnaw Carnival 2017 in Los Angeles on October 28, 2017, .
Trump warns of tariffs on another $267 billion of Chinese imports
Many products purchased by consumers, such as refrigerators, spark plugs and furniture, are among the potential targets. China said it is ready to impose retaliatory tariffs on $60bn worth of U.S. goods if that happens.
The hate spread on Grande's Instagram account today is jarringly reminiscent of an incident that took place earlier this year on Twitter, in which a user blamed Grande for Miller's May auto accident.
"Cops believe Mac OD'd on drugs, and our law enforcement sources say it makes no sense to them that someone who consumed a fatal dose would have the foresight to scrub the house of pill bottles, illegal drugs as well as drug paraphernalia on the off chance they might die". But beyond helping me launch my career he was one of the sweetest guys I ever knew. Mac's father loved him dearly and was really proud of Mac and everything he accomplished.
Grande spoke out publicly about ending their "toxic relationship" after fans blamed her for his arrest.
That accident occurred shortly after he and pop star Ariana Grande had broken up after almost two years of dating.
Bernie Sanders introduces 'Stop BEZOS Act' in the Senate
Anecdotes shared by current and former Amazon employees corroborate these findings. "Meanwhile, Mr. Plus, the legislation likely wouldn't do much to raise wages, the center said.
If you or someone you know is struggling with addiction, please call the Substance Abuse and Mental Health Administration's 24/7 National Helpline at 1-800-662-HELP. Just last month, the Los Angeles Attorney's Office officially charged the rapper with driving under the influence (DUI), stemming from a auto accident in May in the San Fernando Valley.
One of Miller's six albums was named after the "Blue Slide Park" portion of Pittsburgh's Frick Park.
"I have cared for him and tried to support his sobriety & prayed for his balance for years (and always will of course) but shaming / blaming women for a man's inability to keep his shit together is a very major problem", she wrote. "It was like 'diet, carrots, and Mac Miller'".
"I just wanna go on tour", Miller tweeted on Thursday, adding: "The show is going to be special every night".
CT mom suffers 'extreme' injuries after lighting dynamite she mistook for candle
Police said it's preferable the lighting be battery operated, glow stick, or hand crank-powered, to avoid the risk of fire damage. A CT woman was severely hurt when authorities say she lit what she thought was a candle but turned out to be dynamite.