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…
I worked on Pidgin (Gaim, at the time), and was the original author of libpurple (now libgaim). Adium was a sister project that was originally completely different, but utilized some of our Protocol Plugins (aka prpls — basis for the name "libpurple"). It later utilized libgaim when it reached a certain level of maturity. I don't know whether Adium eventually moved fully onto libgaim. I seem to recall it only used it…
If it wasn't obvious, libgaim became libpurple, not the other way around. Too late to edit the parent comment, but felt I should clear that up.