At a glance
Bastion has a Mac version: Steam sells it for macOS. Install it in Steam for Mac; it doesn’t need Uncork.
Bastion came out on Steam on 16 August 2011, made by Supergiant Games.
What your Mac needs
Minimum macOS in the Steam requirements: 10.5.8.
Steam requirements list at least 2 GB of memory for Bastion.
Allow about 1.5 GB of disk space for the Mac version.
How to play
Open Steam for Mac and install Bastion 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 Bastion from there (1 GB). We have not tested it ourselves.
The Windows version through Uncork needs a Mac with Apple Silicon (M1 or newer).
Bastion uses DirectX 9.0c: Uncork renders it with its built-in graphics.