I'm looking for some documentation how to create an apple mail plugin for mac os but without too much luck. Is there any good documentation, sample, tutorial... that explain it? I've found sample posts but the newest one is from 5 years ago. Anyone has a clue about it? I wonder if something have changed since then.
Some posts that I found:
For the record, here is the documentation for mailkit: https://developer.apple.com/documentation/mailkit/build_mail_app_extensions
Also with a video: https://developer.apple.com/videos/play/wwdc2021/10168/
There wasn’t a great solution at the time you posted but in Monterey there is a MailKit extension that finally provides public APIs. It doesn’t seem to have everything yet, but it’s at least the beginning
