Is it possible to install the Portal 2 authoring tools without Portal 2 installed. Otherwise, would it be fool steam into thinking I have?
The reason I'm asking is that I have Portal 2 installed for mac. However I can also run Steam through wine, to play the games only available for windows. Now I want to install the Portal authoring tools on the wine steam, but Steam wants me to download Portal 2. Could I point Steam to my mac version or do I need PC version for it to work?