iScreensaver 5.2 has been released, and provides support for macOS High Sierra 10.13. Please read the 10.13 High Sierra Tech Note
as well as the Release Notes
. macOS 10.14 Mojave is under investigation, and is not yet recommended.
[Solved] Getting Error "You cannot use "xx.screensaver" with this version of OS X..
it's just 2 images with random and loop settings.. Using OpenGL - built with iScreensaver 5.1.1 on an ElCap Mac and being installed on an El Cap Mac.. any help would be greatly appreciated.