This was actually a problem with Steam—Steam integration was broken in all my games. It fixed itself after I upgraded my MacOS to 15.1.

+1. People have been asking for this for years. Not having it really makes remotely planning a base expansion so much harder.

Running latest experimental on macOS 15.0.1 (24A348) Apple Silicon. The game is installed on an external SSD. Every time I launch the game, it gives the message "Couldn't initialize Steam API. Steam-related features are disabled. Restarting Steam usually fixes this issue." Restarting Steam...