fix Xcode signing error

src/node_stroke_preview.cpp

@@ -505,7 +505,7 @@ void NodeStrokePreview::draw_stroke()
         s_renderer = std::thread([] {
             BT_SetTerminate();
             #if __OSX__
-            std::this_thread::sleep_for(std::chrono::milliseconds(100));
+            std::this_thread::sleep_for(std::chrono::seconds(1));
             #endif
             App::I.async_start();
             m_sampler_linear.create();