iScreensaver version 6.8.4 has a number of bug-fixes and improvements, including several bugs that could cause playback failure on multi-monitor macOS Apple Silicon / M1 systems or the macOS Ventura 13.0 beta. Authors who are building screensavers that may be encountering any of these issues should update, re-build, and re-distribute their screensavers.
macOS Monterey 12
iScreensaver 6.8.3 has been tested and found to be fully compatible with macOS Monterey (12.0 through 12.3)
We are testing on the current 12.4 beta and so far have not found any issues, but will update this note once the 12.4 version is officially released.