Signing the Windows EXE requires a certificate and a build process on Windows or on Linux. It doesn't seem to be supported on Mac, which is a problem because in order to build a valid signed Mac App the build process must run on a Mac.
At the moment we don't have a solution for this problem.
We have a user reporting that the EPUB-Checker app gets blocked by Windows Defender SmartScreen on Windows 10 because the executable is not signed:
https://twitter.com/MartinGreenhill/status/1153668391313530883
Signing the Windows EXE requires a certificate and a build process on Windows or on Linux. It doesn't seem to be supported on Mac, which is a problem because in order to build a valid signed Mac App the build process must run on a Mac.
At the moment we don't have a solution for this problem.