Now I have the game installed, but I can't see my profile from Windows game, and I can't create a new profile with the same name – because of "Profile with the same name is already exists"...
UPD: Seems it's also a Steam bug. Manually copied all /remote/* files to mac os folder and now it's ok.
I was about to forward that to someone at Larian since you're last edit was saying that it was not working.
But I'm happy it's working now.
Have a nice one! And merry Christmas.