At the present time, iScreensaver Designer 5.2 provides support for macOS 10.13 High Sierra, but there are some functional limitations.
Please read the 10.13 High Sierra Tech Note
as well as the Release Notes
Due to changes made by Apple, iScreensaver Designer version 5.2 does not currently support macOS 10.14 Mojave.
Please read our forum post
for the latest updates.
[Solved] Cross Dissolve for Media Loop
I am trying to add a dissolve effect to the media portion of the screensaver (that is forever in a loop) so that it is a smooth transition back to the beginning of the media, however, the only effect available is "cut"... Do i need to purchase iScreensaver for the Dissolve effect?