Unfortunately, your GPU does not have Metal support, so will not be able to run the game. It may be possible to upgrade the card, or use an eGPU with Metal support. Mid 2012 MacBook Pro and MacBook Air are the earliest Mac models with Metal support.
The Windows version may work under Bootcamp, since the HD 6750M does have DirectX 11 support. The game does not have native Linux support, but several people have reported the Windows version running well in Steam Proton.