Gaming Question about G2A.com Steam codes and platform compatibility

[mashers]

Hi all

I'm looking to buy this game on Steam:

http://store.steampowered.com/app/403190/

It's for Windows and Mac, and I would need the Mac version. I've found a cheaper Steam code on G2A:

https://www.g2a.com/planetbase-steam-cd-key-global.html

The requirements it lists are only for the Windows version. I opened a support ticket with G2A to ask if the key would work for both the Windows and Mac version, and they said they couldn't guarantee it would allow me to download the Mac version. Does anyone have any experience of buying codes on steam codes on G2A which are listed as PC (Windows) versions and using them to download the Mac version? The same purchase on Steam would typically allow downloading on either platform (or both) but I don't know how this works with keys.

 

[sj33]

No promises, but it's a SteamPlay game so it should work.

 

[mashers]

Thanks buddy. I have just bought the key and added it to the Steam client, and it's now downloading the Mac version