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.
macOS 10.13 ScreenSaver changes, issues and bugs
Today's release of macOS 10.13 brings a number of changes that affect screensavers in general, and iScreensaver specifically. If you have comments or questions, please submit them here to the forum.
Please read the tech note:macOS 10.13 High Sierra Technical Note