+Note: macOS users need to build built-in GtkGLExt before building NetRadiant:
+
+```sh
+cmake -G "Unix Makefiles" -S. -Bbuild -DCMAKE_BUILD_TYPE=Release
+cmake --build build -- -j$(nproc) builtins
+cmake -G "Unix Makefiles" -S. -Bbuild
+cmake --build build -- -j$(nproc)
+```
+
+