At a glance
Kathy Rain has a Mac version: Steam sells it for macOS. Install it in Steam for Mac; it doesn’t need Uncork. The requirements explicitly say Apple Silicon is not supported.
Kathy Rain came out on Steam on 5 May 2016, made by Clifftop Games.
What your Mac needs
Steam requirements list at least 1 GB of memory for Kathy Rain; 4 GB recommended.
Allow about 1 GB of disk space for the Mac version.
How to play
Open Steam for Mac and install Kathy Rain as usual.
If the Mac version will not start, you can install the Windows version through Uncork: download Uncork, sign in to Steam and install Kathy Rain from there (1 GB). We have not tested it ourselves.
The Windows version through Uncork needs a Mac with Apple Silicon (M1 or newer).
Kathy Rain uses DirectX 9.0: Uncork renders it with its built-in graphics.