I wrote to William, he told me where to look. I'll have to check later, I'm on my Mac now.
Well I did find them but would be very hard to describe it to a friend who is playing the game with me, I'm in VA and she is in CA. So hope she won't need to send me any saves to help her.
PS, when I finally found the folder, I had to do a search for them to show up.
I'm thinking when I finish the 3 games and uninstall, going to get rid of Steam and buy games from gog.com.