diff --git a/pysollib/init.py b/pysollib/init.py
index 52906f41..1fbaeccd 100644
--- a/pysollib/init.py
+++ b/pysollib/init.py
@@ -117,7 +117,7 @@ def init():
             else:
                 pysollib.settings.USE_TILE = True
         # "can't invoke event <<ThemeChanged>>: application has been destroyed"
-        # root.destroy()
+        root.destroy()
         tkinter._default_root = None
 
     # check FreeCell-Solver
diff --git a/pysollib/ui/tktile/menubar.py b/pysollib/ui/tktile/menubar.py
index b51ed692..7f5a279f 100644
--- a/pysollib/ui/tktile/menubar.py
+++ b/pysollib/ui/tktile/menubar.py
@@ -646,10 +646,16 @@ class PysolMenubarTkCommon:
         if self.progress:
             self.progress.update(step=1)
 
+        # macOS: tk creates the menu item "Help->PySolFC Help", therefore
+        # we will not create a duplicate "Help->Contents" item.
+        # The tk-provided menu item expects this callback.
+        self.top.createcommand('tk::mac::ShowHelp', self.mHelp)
+
         menu = MfxMenu(self.menubar, label=n_("&Help"))
-        menu.add_command(
-            label=n_("&Contents"),
-            command=self.mHelp, accelerator=m+"F1")
+        if WIN_SYSTEM != "aqua":
+            menu.add_command(
+                label=n_("&Contents"),
+                command=self.mHelp, accelerator=m+"F1")
         menu.add_command(
             label=n_("&How to play"),
             command=self.mHelpHowToPlay)
diff --git a/pysollib/ui/tktile/tkutil.py b/pysollib/ui/tktile/tkutil.py
index 4908881c..381bc61f 100644
--- a/pysollib/ui/tktile/tkutil.py
+++ b/pysollib/ui/tktile/tkutil.py
@@ -112,6 +112,7 @@ def make_help_toplevel(app, title=None):
     from pysollib.winsystems import init_root_window
     window = tkinter.Toplevel(class_=TITLE)
     init_root_window(window, app)
+    window.tkraise()
     return window