He attended high school in Red Deer, Alberta, where he met his future wife Cari. After high school, MacLean was prepared to attend the University of Alberta until he was asked to fill in for a sick friend at CKRD-FM, which led to a job at CKRD-TV. Although he never attended university, MacLean received an honorary degree from the University of Alberta in 2019.
On November 9, 2019, MacLean's co-host Don Cherry made remarks during Coach's Corner suggesting that Canadian immigrants benefit from the sacrifices of veterans and do not wear remembrance poppies. MacLean, who nodded during Cherry's rant and flashed a thumbs-up sign at the end of Saturday's segment, apologized the following day for staying silent during Cherry's remarks. The following day, Sportsnet president Bart Yabsley announced that Cherry had been fired: "Following further discussions with Don Cherry after Saturday night's broadcast, it has been decided it is the right time for him to immediately step down." The following day, Cherry had expressed his disappointment over MacLean's apology. On November 16, 2019, MacLean addressed and reflected on the incident during Hockey Night in Canada, the first without Cherry, also announcing the end of Coach's Corner.