diff --git a/example/main.go b/example/main.go
index 78cbf13..71fbf3a 100644
--- a/example/main.go
+++ b/example/main.go
@@ -63,11 +63,13 @@ func onReady() {
 		toggle := func() {
 			if shown {
 				subMenuBottom.Check()
+				subMenuBottom2.Hide()
 				mQuitOrig.Hide()
 				mEnabled.Hide()
 				shown = false
 			} else {
 				subMenuBottom.Uncheck()
+				subMenuBottom2.Show()
 				mQuitOrig.Show()
 				mEnabled.Show()
 				shown = true
diff --git a/systray.go b/systray.go
index a5ebaaf..b2e4abc 100644
--- a/systray.go
+++ b/systray.go
@@ -110,8 +110,7 @@ func Quit() {
 	}
 }
 
-// AddMenuItem adds menu item with designated title and tooltip, returning a channel
-// that notifies whenever that menu item is clicked.
+// AddMenuItem adds a menu item with the designated title and tooltip.
 //
 // It can be safely invoked from different goroutines.
 func AddMenuItem(title string, tooltip string) *MenuItem {
@@ -125,8 +124,7 @@ func AddSeparator() {
 	addSeparator(atomic.AddInt32(&currentID, 1))
 }
 
-// AddSubMenuItem adds nested sub-menu item with designated title and tooltip, returning a channel
-// that notifies whenever that menu item is clicked.
+// AddSubMenuItem adds a nested sub-menu item with the designated title and tooltip.
 //
 // It can be safely invoked from different goroutines.
 func (item *MenuItem) AddSubMenuItem(title string, tooltip string) *MenuItem {
diff --git a/systray_darwin.m b/systray_darwin.m
index 2b7b8ee..67e696c 100644
--- a/systray_darwin.m
+++ b/systray_darwin.m
@@ -176,13 +176,10 @@ NSMenuItem *find_menu_item(NSMenu *ourMenu, NSNumber *menuId) {
 
 - (void) hide_menu_item:(NSNumber*) menuId
 {
-  NSMenuItem* menuItem;
-  int existedMenuIndex = [menu indexOfItemWithRepresentedObject: menuId];
-  if (existedMenuIndex == -1) {
-    return;
+  NSMenuItem* menuItem = find_menu_item(menu, menuId);
+  if (menuItem != NULL) {
+    [menuItem setHidden:TRUE];
   }
-  menuItem = [menu itemAtIndex: existedMenuIndex];
-  [menuItem setHidden:TRUE];
 }
 
 - (void) setMenuItemIcon:(NSArray*)imageAndMenuId {
@@ -199,13 +196,10 @@ NSMenuItem *find_menu_item(NSMenu *ourMenu, NSNumber *menuId) {
 
 - (void) show_menu_item:(NSNumber*) menuId
 {
-  NSMenuItem* menuItem;
-  int existedMenuIndex = [menu indexOfItemWithRepresentedObject: menuId];
-  if (existedMenuIndex == -1) {
-    return;
+  NSMenuItem* menuItem = find_menu_item(menu, menuId);
+  if (menuItem != NULL) {
+    [menuItem setHidden:FALSE];
   }
-  menuItem = [menu itemAtIndex: existedMenuIndex];
-  [menuItem setHidden:FALSE];
 }
 
 - (void) quit