I have been getting “similar” popups on RW 8x for awhile on macOS 10.15.5, but I’ve just always clicked on Update Plugins, but no plugins ever update so I’ve just accepted this as part of the RapidWeaver startup process.
But it does get kind of old, especially since (I think) the list got longer after I updated to 8.9.1. However, my popup says “not codesigned by the developer.” I don’t even know what that means.
Finally, today (without even reading this thread), I decided to ask here on the RW Forum how to eliminate this popup, thus the screenshot. Then it occurred to me to just move these plugins into the Disabled Plugins folder, but these plugins weren’t even listed in the RW8 Addons folder.
They were actually in the RW7 folder so I moved them to the RW8 Disabled Plugins folder, though that might have been the wrong thing to do, and please somebody (like @teefers) let me know if it was wrong.
I then restarted RapidWeaver 8.9.1, and the most amazing thing happened: It restarted (at least) 2x faster, no more Update Plugins window, just automatically opens the RW Project I’m working on, and RW itself operates at least 2x faster.