Biography
Donald Sage Mackay is an American actor. He trained at the University of California, San Diego, where he received an MFA in acting.
Mackay has appeared in numerous television series, including guest roles in House (2004), Mad Men (2007), Modern Family (2009), NCIS (2003) and Elementary (2012). Recent credits include Wreck (2022–2024) as Henry Allan, Eric (2024) as Jerry, and The Regime (2024) as Richard Kaiser. He is also credited in The Great Escaper (2023) and the forthcoming Nuremberg (2025) as Senator William Fulbright.
