We are in the closing stages, before releasing DC3 v2 version. You can have a look here: https://forums.x-pilot.com/forums/forum/242-douglas-dc-3-v2/
or join our discord server for more: https://discord.gg/85apMfvm.
https://developer.apple.com/library/archive/documentation/Security/Conceptual/CodeSigningGuide/Procedures/Procedures.html#//apple_ref/doc/uid/TP40005929-CH4-SW2
Search the page for "Signing Code Manually" .. you can sign binaries from the Terminal...