hi how can I play hinterland on my iMac, I am running Monterey

You will need to contact the developer to see if they offer a macOS version of this game.

Alternately, you may be able to run it in a Virtual Machine under something like Parallels or VMware. With either of these, you can create a VM of a Windows XP machine. Then install the Windows version of this game on that VM.

Hinterland is not an Apple product.

Check with the Hinterland developer for Mac compatibility and minimum system requirements as well as installation and guidance for play.

I don't find it runs on a Mac...

Necessary PC requirements

CPU1.8 GHz processor or higher 

RAM512 MB RAM

Windows XP® (1 GB for Windows® Vista) 

GPU64 MB DirectX 8.1 compatible card DXDirectX 8.1 

Operating systemWindows® XP or Vista 

Storage350 MB free hard drive space

Good work, thanks for the tip! :)