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.
Space imagery courtesy nasa.gov and ESA/Hubble; no NASA or ESA endorsement, nor sponsorship of iScreensaver implied.
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We strongly support the international Paris Agreement - together Screensavers and EnergyStar save energy.