iScreensaver Designer 6 provides full supoprt for 10.13 High Sierra, 10.14 Mojave, and 10.15 Catalina, and all users of version 5 are encouraged to upgrade.
If you are using version 5, please note that iScreensaver Designer 5.2 provides support through macOS 10.12 Sierra. There is limited support for macOS 10.13 High Sierra, there are major functional limitations and we do not recommend version 5 for use on 10.13.
For details: please read https://iscreensaver.com/help/notes/high_sierra/high_sierra.shtml for details.
iScreensaver Designer version 5.2 does not currently support macOS 10.14 Mojave or macOS 10.15 Catalina at all, and an upgrade to version 6 is required.
Please check back here for updates, and be sure to sign up for our Mailng List if you’d like to be notified by email: https://iscreensaver.com/mailinglist