New to Alteryx

[AkaCarioca]

Folks:

I just started learning Alteryx, and I am stuck on the Getting Started Learning Path:



What am I supposed to do here?
I am working on a Mac, and the files provided are .yxmd, which can't be opened.
What is the expected solution? 
I have not installed any Alteryx trial yet.

Thanks

[Qiu]

@AkaCarioca 
As of now, I think Alteryx is not supporting  Mac, kindly see here for VM alternative.

https://community.alteryx.com/t5/Alteryx-Designer-Desktop-Discussions/Alteryx-on-Mac/td-p/1181842