At a glance
Car Mechanic Simulator 2018 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.
Car Mechanic Simulator 2018 came out on Steam on 28 July 2017, made by Red Dot Games.
What your Mac needs
Minimum macOS in the Steam requirements: 10.9.
Steam requirements list at least 4 GB of memory for Car Mechanic Simulator 2018; 8 GB recommended.
Allow about 20 GB of disk space for the Mac version.
How to play
Open Steam for Mac and install Car Mechanic Simulator 2018 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 Car Mechanic Simulator 2018 from there (20 GB). We have not tested it ourselves.
The Windows version through Uncork needs a Mac with Apple Silicon (M1 or newer).
Car Mechanic Simulator 2018 uses DirectX 11: Uncork renders it with D3DMetal.