At a glance
Trine 2: Complete Story 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.
Trine 2: Complete Story came out on Steam on 6 June 2013, made by Frozenbyte.
What your Mac needs
Minimum macOS in the Steam requirements: 10.7.
Steam requirements list at least 1 GB of memory for Trine 2: Complete Story.
Allow about 4 GB of disk space for the Mac version.
How to play
Open Steam for Mac and install Trine 2: Complete Story 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 Trine 2: Complete Story from there (4.5 GB). We have not tested it ourselves.
The Windows version through Uncork needs a Mac with Apple Silicon (M1 or newer).
Trine 2: Complete Story uses DirectX 9.0c: Uncork renders it with its built-in graphics.