Larian Studios Forums Divinity - Original Sin Divinity - Original Sin - Technical Issues Fun with Fungi - quest bugged?

On Mac, in this case you would probably just need to include your latest save with an email. In Windows each save is a folder in the '..\Documents\Larian Studios\Divinity Original Sin\PlayerProfiles\<ProfileName>\Savegames' folder, so I would assume on Mac they are in a corresponding location.