[8] As a junior, McKenney led St. Mary's to a 27–1 record and the 2024 MHSAA Division 1 state championship, scoring 32 points and 10 rebounds in a victory over North Farmington on March 16.

[14] Following his junior year, McKenney represented the United States men's national under-18 basketball team at the 2024 FIBA Under-18 AmeriCup, winning a gold medal.

[5] On November 9, 2024, McKenney announced his commitment to the University of Michigan via a live broadcast on 247Sports, choosing from his final list that also included Georgetown and USC.

[4] As a blue chip five-star recruit, he received over 30 offers and was listed as the 19th best basketball player in the national class of 2025, according to the 247Sports composite ranking at the time of his commitment.

He was listed second because they recognized Darius Acuff as a Michigan native, although he had transferred from Detroit Cass Tech to IMG Academy in Florida as a junior.

[24] In December 2024, at the Motor City Roundball Classic, McKenney became the all-time leading scorer in St. Mary's basketball history, passing former Michigan State guard Kalin Lucas' mark of 1,688 career points.

[25] As seniors, McKenney and Acuff met in an interstate matchup, with IMG Academy and St. Mary's playing each other in a closely contested regular season game.

[17] Following the contest against IMG, McKenney found out he broke a metacarpal on his left hand in the third quarter, forcing him to miss multiple games as a result.

He was the first Michigan signee to be selected since Moussa Diabaté, Caleb Houstan and Kobe Bufkin in 2021, and would be the first to play in the game since Daniel Horton in 2002 (due to the COVID-19 cancellation in 2021).