At a glance
Planet Coaster has a Mac version: Steam sells it for macOS. The Mac requirements list only Intel: on Apple Silicon Rosetta 2 runs it, and old Mac versions sometimes do not start on current macOS. Try it in Steam for Mac first.
Planet Coaster came out on Steam on 17 November 2016, made by Frontier Developments.
Mac version by Aspyr.
What your Mac needs
The Mac requirements list only Intel.
Minimum macOS in the Steam requirements: 10.14.
Steam requirements list at least 6 GB of memory for Planet Coaster.
Allow about 15 GB of disk space for the Mac version.
How to play
Open Steam for Mac and install Planet Coaster 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 Planet Coaster from there (8 GB). We have not tested it ourselves.
The Windows version through Uncork needs a Mac with Apple Silicon (M1 or newer).
Planet Coaster uses DirectX 11: Uncork renders it with D3DMetal.