Adium ( https://adium.im/ ) used to be the MacOSX native version (port) of Pidgin. It seems they still recommend it. However, Adium seems kind of dead? Last commit ( https://github.com/adium/adium/ ) was in 2016. I build a MacOSX app bundle for the original Pidgin long time ago ( https://sourceforge.net/projects/pidgin-macosx/ ). At that point in time, this was not so trivial, as the GTK support for native MacOSX was…
Adium is a frontend on libpurple. The frontend can be sort of happily dead if the backend - and it's plugins - are updated.
I ran into this ~ 6 months ago when I was trying to make Slack work in Adium. The plugin for Slack was outdated. There was a newer libpurple Slack plugin, but it wasn't compiled for Adium. I attempted to recompile it, but I couldn't seem to manage it, all of the tutorials on how to do it were super confusing...
(If anyone knows how to make Slack work in Adium in 2021, please let me know!)