OPM targets the Linux platform, but that does not prevent you from experimenting with OPM in a Windows, OS X, or other environment.
This page will lead you through installing all prerequisites and Flow in a virtual environment. The recipe is made for Windows users, but the exact same steps can be retraced on other platforms, such as Linux and OS X installations.
The benefit of using a virtual environment is that you can try out Flow in a safe environment without affecting the rest of your computer. If you don’t like it, it’s really easy to remove.