Age of Empires II: Definitive Edition is only officially supported on Windows 10 or 11. Check out the link below for the full list of minimum system requirements.
Age of Empires II: Definitive Edition
For a solution on Mac, you may want to explore Parallels Desktop, which partnered with World’s Edge to officially support Age of Empires III: Definitive Edition. Age II: DE is not officially supported on Parallels Desktop but testing from Parallels themselves show promising results. More information about that can be found on their blog.