diff --git a/examples/canvas/main.c b/examples/canvas/main.c
index 6106c21..cef34b9 100644
--- a/examples/canvas/main.c
+++ b/examples/canvas/main.c
@@ -193,14 +193,14 @@ int main()
 			mg_set_font(font);
 			mg_set_font_size(12);
 			mg_move_to(50, 600-50);
-
+/*
 			str8 text = str8_pushf(mem_scratch(),
 			                      "Milepost vector graphics test program (frame time = %fs, fps = %f)...",
 			                      frameTime,
 			                      1./frameTime);
 			mg_text_outlines(text);
 			mg_fill();
-
+*/
 			printf("Milepost vector graphics test program (frame time = %fs, fps = %f)...\n",
 			                      frameTime,
 			                      1./frameTime);
diff --git a/src/mtl_surface.m b/src/mtl_surface.m
index 1d9aa56..e963024 100644
--- a/src/mtl_surface.m
+++ b/src/mtl_surface.m
@@ -120,10 +120,10 @@ void mg_mtl_surface_present(mg_surface_data* interface)
 void mg_mtl_surface_swap_interval(mg_surface_data* interface, int swap)
 {
 	mg_mtl_surface* surface = (mg_mtl_surface*)interface;
-
-	////////////////////////////////////////////////////////////////
-	//TODO
-	////////////////////////////////////////////////////////////////
+	@autoreleasepool
+	{
+		[surface->mtlLayer setDisplaySyncEnabled: (swap ? YES : NO)];
+	}
 }
 
 void mg_mtl_surface_set_frame(mg_surface_data* interface, mp_rect frame)