Move the prebuilt macOS icon to data/icons

data/icons/meson.build

@@ -11,3 +11,7 @@ install_data(
   join_paths(symbolic_dir, ('@0@-symbolic.svg').format(application_id)),
   install_dir: join_paths(get_option('datadir'), 'icons', symbolic_dir)
 )
+
+if build_machine.system() == 'darwin'
+  install_data('diffuse.icns', install_dir: '/Applications/Diffuse.app/Contents/Resources')
+endif

src/diffuse/meson.build

@@ -20,8 +20,6 @@ configure_file(
 )
 
 if build_machine.system() == 'darwin'
-  install_subdir('mac-os-app/Diffuse.app', install_dir: '/Applications', strip_directory: false)
-
   configure_file(
     input: 'mac-os-app/diffuse-mac.in',
     output: 'diffuse',