For various reasons I have a dual boot setup with El Capitan and Sierra. Is it possible to have the two OS installations share the documents and desktop folders? I've already made shortcuts (symbolic links) in both OS installations, but it is not the most elegant solution I would like the Sierra installations desktop and documents folder to be the ones that are used in El Capitan as well. So when I boot El Capitan, I see the same files and folders on my desktop as in Sierra. I imagine that I have to do some tricks in Terminal right?