Anemona, because it's 64-bit, actually WORKS on macOS 12 Mojave. Yay! BUT! Getting it to run is a chore: (1) Double-click it to install it into your screensavers, as per usual. Not a problem yet. (2) If you attempt to now run it inside System Preferences/Desktop & Screen Saver it's going to FAIL due to no Apple Developer certificate. So, what to do? Find where you installed it. It's in either the Admin or User Library/Screen Savers folder. (3) Do the usual Control-Click (control-rightclick) to bring up the contextual menu to 'Open' it anyway, bypassing the need for an Apple Dev Cert. (4) Now you can access Anemona via the Screen Saver system prefs, BUT! When you use it the first time or 'Preview' it, you may get a black screen. Getting out of the black screen can seem annoying as you can't simply swipe your cursor to get out of it. Be patient and keep trying. Eventually, the thing will stop the blackness. (5) Now TRY AGAIN and it works. My best guess is that the black screen is the software churning in the background to set itself up and generate its. But it WILL eventually work just fine after those training wheels fall off. Yay. - - This same process should work on any old, no Apple Dev Cert screen saver.