Macaulay Culkin has “unfinished business” with Catherine O’Hara. The Running Point actor opened up about how the death of his Home Alone co-star has impacted him in a new profile with the Gentleman’s Journal . The Emmy Award winner died Jan. 30 from a pulmonary embolism, according to the Los Angeles County Department of Public Health. Rectal cancer was listed as the underlying cause of death. O’Hara portrayed Kate McCallister, the mother of Culkin’s Kevin McCallister, in the beloved Home Alone films. “When Catherine passed away in January, that hit me,” Culkin said. “That hit me pretty good, ’cause, you know, it was just too soon. And I felt that we had unfinished business. I definitely feel like I had unfinished business with her, you know? I feel like I owed her a favour — and I don’t like having an outstanding debt.” O’Hara’s death shocked Hollywood, leading many of her former co-stars, collaborators and more from the industry to pen tributes in her honor .…