Following the cessation of this year's free agency and trade period, North Melbourne has farewelled a trio of off-contract players in preparation for the 2024 campaign.
Turner, the most experienced of the three, played 130 AFL games throughout his Arden Street tenure spanning 2014-2023, while Mahony (44 games) and Bonar (34) weren't afforded as many senior playing opportunities.
The Roos had high hopes for Bonar, whom they recruited in 2019 after a frustrating GWS stint, though he wasn't able to latch on during his four seasons as a Shinboner.
North Melbourne football boss Todd Viney expressed his thanks to the trio for their efforts and contributions as Roos.
"Kayne made a significant contribution across his almost 10 years at Arden Street, highlighted by his recent induction as a life member of the club and two seasons in the leadership group," Viney said as part of a Friday afternoon club statement.
"He always had a team-first attitude, and we thank him for his dedication to North Melbourne.
"We also thank Jack and Aiden for all their efforts and their dedication to our program during their three years here.
"These decisions are never easy to make, and we wish all three men the best for their future endeavours."