This is mandatory in 10.15: Notarizing Your Mac Software for macOS Catalina: As a reminder, Mac software distributed outside the Mac App Store must be notarized by Apple in order to run on macOS Catalina.
How on earth is this even legal?
More details in the original ticket: #2015
Another problem with Catalina: #2453.
See also Safely open apps on your Mac, and in particular: How to open an app that hasn’t been notarized or is from an unidentified developer
See Pythonmac-SIG: ctypes, codesigning, notarizing, py2app?: I’ve found a solution. Adding the following entitlement during codesigning allows me to use ctypes:
You can still run the app without having notarized: Can't you just right click?
this ticket has been moved to: https://github.com/Xpra-org/xpra/issues/2441