Added a dedicated darwin branch in src/fe-gtk/meson.build while preserving the existing Windows and non-Windows (freedesktop) notification branches. In this macOS branch, notifications/notification-osx.m is appended to sources, Objective-C is enabled via add_languages('objc'), and pkg-config probing now tries gtk-mac-integration first and falls back to gtkosxapplication.

When either mac integration dependency is found on darwin, Meson now adds that dependency and defines -DHAVE_GTK_MAC in zoitechat_gtk_cflags, which activates the existing #ifdef HAVE_GTK_MAC blocks in the GTK frontend code.

Verified the existing source guards that become active with HAVE_GTK_MAC are already present in the requested files:

fe-gtk.h (mac header include + extern).

fe-gtk.c (global mac app object and mac-specific paths).

menu.c (mac menubar/app-menu integration).

maingui.c (mac dock attention request).

src/fe-gtk/meson.build

@@ -85,6 +85,20 @@ if host_machine.system() == 'windows'
   #  sources: 'notifications/notification-winrt.cpp'
   #)
 
+elif host_machine.system() == 'darwin'
+  zoitechat_gtk_sources += 'notifications/notification-osx.m'
+  add_languages('objc')
+
+  gtk_mac_dep = dependency('gtk-mac-integration', required: false)
+  if not gtk_mac_dep.found()
+    gtk_mac_dep = dependency('gtkosxapplication', required: false)
+  endif
+
+  if gtk_mac_dep.found()
+    zoitechat_gtk_deps += gtk_mac_dep
+    zoitechat_gtk_cflags += '-DHAVE_GTK_MAC'
+  endif
+
 else
   zoitechat_gtk_sources += 'notifications/notification-freedesktop.c'
 endif