Gah, I thought we fixed the Steam launch for Macs! Would you mind popping on our Discord server (linked in the main menu of the game) and letting us know exactly what pops up?
There's not much to tell, really. If I launch the Steam app on my Mac and search for Ravager, it's greyed out with the little 'Not Available' symbol next to it. Hovering over that symbol gives the tooltip 'Your current MacOS version is unable to run 32-bit games.' Maybe I can override this and install it anyway, but if so, the message is pretty misleading. I'd put it down to a Steam issue rather than yourselves. This happens a lot.
Act V will be our final Act, although we'll continue to add new content (hordes, areas, waifus, animated scenes, etc) once the main plotline has been finished. You can find out more about it here: https://subscribestar.adult/posts/471615