First-degree murder carries an automatic life sentence with no parole for 25 years, but a court can decide to impose consecutive periods of parole ineligibiliy for several convictions.
Some of McArthur's eight victims-Skandaraj (Skanda) Navaratnam, Soroush Mahmudi, Dean Lisowick, Majeed Kayhan, Selim Esen, Andrew Kinsman, Kirushnakumar Kanagaratnam and Abdulbasir Faizi-were of Middle Eastern and South Asian descent.
The week-long sentencing hearing followed McArthur pleading guilty to eight counts of first-degree murder.
Numerous victims, although not all, were from the Gay Village, a neighborhood in Toronto known for its predominantly gay population. "The family friends and the community have been victimized twice - once when they went missing ... then again when they learn the horrific truth", McMahon said.
Some victims' remains were found in the planters of homes where McArthur did landscaping contracting.
At various points in his decision, McMahon called McArthur "morally bankrupt" and said he acted with a "complete lack of humanity".
The punishment handed against 67-year-old Bruce McArthur comes just days after prosecutors told a court that he dressed his deceased victims in fur coats and placed cigars in their mouths for a series of morbid, staged photographs.
"The ability to decapitate, dismember his victims and do it repeatedly, is pure evil", he said.
He said at the time he spoke, there was only evidence that connected McArthur to one homicide - Kinsman - and not any others.
"If he were to be paroled I think we would have to start questioning sentencing in this country".
"This is a crime of stark horror", Cantlon said in a statement. "Unfortunately, they will live with this nightmare for the rest of their lives".
The sentence brings to an end the protracted effort to find and punish the killer in Toronto's gay village, dating back to the creation in late 2012 of a task force to probe the disappearances of Navaratnam, Faizi and Kayhan.
The investigation would later take police to dozens of properties where McArthur worked, to be excavated in search of evidence.
Idsinga said police are still reviewing a number of cold cases to see if they can find any links to McArthur. "In hindsight, (Kinsmen) left the name of his killer on his calendar".
There is now an independent review of how police treat missing persons cases, after outcry over how McArthur was able to kill undetected for seven years.
Toronto police and the trial did not reveal a motive.
Outside the courthouse on Friday, Nicole Borthwick - a friend of Kinsman, Lisowick and Esen - expressed her disappointment with the sentence.
Triple killer Dellen Millard must wait 75 years to seek parole - he'll be 102.
"There is nothing I have said that has put anyone in guilt", said Saunders, adding in explanation it's "not a trial but a tribunal" where the "officer can explain what he did", which includes recording video of McArthur and the entering of information to the computer that was later useful when he was identified as a suspect. "That doesn't mean he's going to be free".