The 6.08.1 version of XScreenSaver for Mac was provided as a free download on our website. This free Mac app was originally designed by Jamie Zawinski. The application lies within Theming Tools, more precisely Screensavers.
From the developer:
XScreenSaver is a collection of several hundred screen savers. This is a Mac port of the standard screen saver collection shipped on most Linux and Unix systems.
You may want to check out more software for Mac, such as scarytime v9, Christmas Tree Creator '04 or DesktopEarth 3D, which might be similar to XScreenSaver.