While Cities: Skylines is not currently on Apple Arcade, it is occasionally available on PC Game Pass. While Game Pass is primarily for Windows, it is worth checking if the game is available via cloud gaming services that run in a browser on your Mac.
Searching for a is a high-risk, low-reward endeavor. The likelihood of infecting your Mac with malware, dealing with a buggy game that won't save correctly, and fighting against macOS security protocols makes the process more trouble than it is worth. Cities Skylines Mac Torrent -