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.
iScreensaver: Code Signing and Notarization for macOS
We have updated our instrutions for code-siging and notarizing your built iScreensavers for macOS. There is now a command-line script you can run from the Terminal which will do all the hard work for you.
Check it out here: https://iscreensaver.com/help/notes/code_signing/code_signing.shtml#option2