Description of problem : 

When I downloaded the butane binary via the curl command mentioned in the documentation, it downloaded the butane binary which was not supported on MacOS.

https://docs.openshift.com/container-platform/4.14/installing/install_config/installing-customizing.html#installation-special-config-butane-install_installing-customizing

Error message - 

$ butane --files-dir . control-plane-interface.bu > control-plane-interface.yaml zsh: exec format error: butane
 

Instead I tried using `butane-darwin-amd64` binary, which worked as expected.

So, It would be really helpful if we could specify this in the documentation as well. It will help customers to avoid confusion.