The sentence means he will not be eligible to apply for parole until he's 91 years old.
McArthur pleaded guilty to eight charges of first degree murder between 2010 and 2017.
McArthur pleaded guilty to killing Andrew Kinsman, Selim Esen, Majeed Kayhan, Dean Lisowick, Soroush Mahmudi, Skandaraj Navaratnam, Abdulbasir Faizi and Kirushna Kanagaratnam.
February 23, 2018 - Police lay a sixth charge of first-degree murder against McArthur, identify Navaratnam as one of the alleged victims whose remains were found in the planters. Most of the victims were from the Gay Village neighborhood of Toronto.
McArthur stood impassively in a red plaid shirt and grey jumper while the sentence was handed down on Friday.
"Mr. McArthur would no doubt have continued killing innocent victims if not apprehended", McMahon told a courtroom Friday, according to The Globe and Mail.
McArthur's string of murders has prompted an inquiry by a retired judge into how the Toronto police handle missing persons cases and whether their investigations are influenced by the sexuality or race of those who have vanished.
After the sentencing, Nicole Borthwick, who knew some of the victims, said outside court that the judge was too lenient.
"The accused has saved the family, friends and community at large from enduring a graphic public trial that would have been a nightmare for everyone", McMahon said, according to CTV.
Several members of the gay community told reporters outside the courthouse they were disappointed McArthur did not receive a harsher penalty, while others accepted that he would likely die behind bars. Most victims were immigrants and of South Asian or Middle Eastern descent.
McMahon said McArthur not only took advantage of vulnerable people in the community but also innocent people like the homeowners on Mallory Crescent, where he had stored the cut up body parts of his victims, unbeknownst to them.
Now, with the trial over, advocates want to put the focus back on why so many died before police cracked the case.
McArthur posed their bodies for photographs, with numerous pictures featuring the same fur coat.
Two police investigations into the missing men returned no leads, even though McArthur's name came up during one investigation, and he was as a witness (not a suspect) during the later one. He was found bound to a bed with a bag over his head but otherwise unharmed.
Criminal experts say it is unusual for someone to become a serial killer later in life, but the prosecution said there is no evidence of earlier murders. He had many friends in the gay community, who launched search parties after he disappeared and who immediately pressured the police to look into his disappearance the day after Toronto's pride parade.
Rae, the former city councillor, said the resistance to believing there could be a serial killer reflected the city's need to believe it was safe.
Saunders echoed Idsinga's statement but said no length of sentence would be enough for some.
The last victim, Andrew Kinsman, was superintendent of McArthur's apartment building.