In prior versions of Mac OSX I was able to use the really awesome screensavers from Darren Aronofsky's The Fountain, though they don't function in El Capitan.
They were made in iScreensaver and I have literally never seen anything like them and I would like get them working in El Capitan if at all possible.
If there's a way or suggestions to bring them in line with El Capitan I would appreciate knowing it.
