Q: Computer Name screen saver on the login screen

Right now I am just trying to do this on the server but I may want to also apply it to managed clients in the future.

Thanks for the links.  However, from what the knowledge base article says, third party and custom screen savers will not work on the login screen in El Capitan for security reasons.  I was trying to find out if anyone has figured out how to set the showClock option of the Computer Name screen saver when it is used on the login screen.  It works fine when set as a screen saver by a user but the setting appears to be ignored when it is used for the login screen saver.  Not sure if that is a bug or if it is intentionally deactivated on the login screen for some reason.  At this point I don't think it is worth the trouble of trying to figure out.  Just thought it would be a nice login screen saver.