diff --git a/apps/toys/Hello/src/main/java/hello/HelloPopup.java b/apps/toys/Hello/src/main/java/hello/HelloPopup.java
--- a/apps/toys/Hello/src/main/java/hello/HelloPopup.java
+++ b/apps/toys/Hello/src/main/java/hello/HelloPopup.java
@@ -128,11 +128,10 @@
             }
 
             nextPopup.show(popupParent, popupX, popupY);
-            
-            Iterator<Window> windows = Window.impl_getWindows();
-            while (windows.hasNext()) {
-                System.out.println("W: " + windows.next().getClass().getName());
-            }
+
+            Window.getWindows().stream().forEach(window -> {
+                System.out.println("W: " + window.getClass().getName());
+            });
         }
     }
 
diff --git a/modules/graphics/src/main/java/com/sun/javafx/tk/Toolkit.java b/modules/graphics/src/main/java/com/sun/javafx/tk/Toolkit.java
--- a/modules/graphics/src/main/java/com/sun/javafx/tk/Toolkit.java
+++ b/modules/graphics/src/main/java/com/sun/javafx/tk/Toolkit.java
@@ -855,14 +855,12 @@
      */
     public void pauseScenes() {
         pauseScenesLatch = new CountDownLatch(1);
-        Iterator<Window> i = Window.impl_getWindows();
-        while (i.hasNext()) {
-            final Window w = i.next();
-            final Scene scene = w.getScene();
+        Window.getWindows().stream().forEach(window -> {
+            final Scene scene = window.getScene();
             if (scene != null) {
                 this.removeSceneTkPulseListener(scene.impl_getScenePulseListener());
             }
-        }
+        });
         this.getMasterTimer().pause();
         SceneHelper.setPaused(true);
     }
@@ -874,14 +872,12 @@
     public void resumeScenes() {
         SceneHelper.setPaused(false);
         this.getMasterTimer().resume();
-        Iterator<Window> i = Window.impl_getWindows();
-        while (i.hasNext()) {
-            final Window w = i.next();
-            final Scene scene = w.getScene();
+        Window.getWindows().stream().forEach(window -> {
+            final Scene scene = window.getScene();
             if (scene != null) {
                 this.addSceneTkPulseListener(scene.impl_getScenePulseListener());
             }
-        }
+        });
         pauseScenesLatch.countDown();
         pauseScenesLatch = null;
     }
diff --git a/modules/graphics/src/main/java/javafx/stage/Window.java b/modules/graphics/src/main/java/javafx/stage/Window.java
--- a/modules/graphics/src/main/java/javafx/stage/Window.java
+++ b/modules/graphics/src/main/java/javafx/stage/Window.java
@@ -28,8 +28,10 @@
 import java.security.AllPermission;
 import java.security.AccessControlContext;
 import java.security.AccessController;
+import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.Iterator;
+import java.util.List;
 
 import javafx.beans.property.DoubleProperty;
 import javafx.beans.property.DoublePropertyBase;
@@ -134,20 +136,25 @@
     }
 
     /**
-     * Return all Windows
+     * Returns a list containing a reference to the currently existing JavaFX windows. The list, whilst mutable, is
+     * simply a reflection of the state at that moment in time - modifying the list will have no impact at all.
      *
-     * @return Iterator of all Windows
-     * @treatAsPrivate implementation detail
-     * @deprecated This is an internal API that is not intended for use and will be removed in the next version
+     * <p>It is strong encouraged that developers do not retain a reference to this list outside of their immediate
+     * use case (i.e. within the relevant method), as doing so can lead to memory leaks.</p>
+     *
+     * @return A list containing all windows currently showing.
+     * @since 9
      */
-    @Deprecated
-    public static Iterator<Window> impl_getWindows() {
+    public static List<Window> getWindows() {
         final SecurityManager securityManager = System.getSecurityManager();
         if (securityManager != null) {
             securityManager.checkPermission(new AllPermission());
         }
 
-        return (Iterator<Window>) windowQueue.iterator();
+        Iterator<Window> it = (Iterator<Window>) windowQueue.iterator();
+        List<Window> windows = new ArrayList<>();
+        it.forEachRemaining(windows::add);
+        return windows;
     }
 
     final AccessControlContext acc = AccessController.getContext();
diff --git a/modules/jmx/src/main/java/com/oracle/javafx/jmx/SGMXBeanImpl.java b/modules/jmx/src/main/java/com/oracle/javafx/jmx/SGMXBeanImpl.java
--- a/modules/jmx/src/main/java/com/oracle/javafx/jmx/SGMXBeanImpl.java
+++ b/modules/jmx/src/main/java/com/oracle/javafx/jmx/SGMXBeanImpl.java
@@ -362,12 +362,10 @@
 
     private void importWindows() {
         int windowCount = 0;
-        final Iterator<Window> it = Window.impl_getWindows();
+        final List<Window> windows = Window.getWindows();
 
         jwindows = JSONDocument.createArray();
-        while (it.hasNext()) {
-            final Window window = it.next();
-
+        for (Window window : windows) {
             windowMap.put(windowCount, window);
 
             final JSONDocument jwindow = JSONDocument.createObject();
diff --git a/modules/jmx/src/test/java/com/oracle/javafx/jmx/SGMXBean_sceneGraph_Test.java b/modules/jmx/src/test/java/com/oracle/javafx/jmx/SGMXBean_sceneGraph_Test.java
--- a/modules/jmx/src/test/java/com/oracle/javafx/jmx/SGMXBean_sceneGraph_Test.java
+++ b/modules/jmx/src/test/java/com/oracle/javafx/jmx/SGMXBean_sceneGraph_Test.java
@@ -43,6 +43,7 @@
 
 import java.util.HashSet;
 import java.util.Iterator;
+import java.util.List;
 import java.util.Set;
 
 public class SGMXBean_sceneGraph_Test {
@@ -74,12 +75,10 @@
         stage2.setScene(scene2);
         stage2.show();
 
-        final Iterator<Window> it = Window.impl_getWindows();
+        final List<Window> windows = Window.getWindows();
         nodesCount = 0;
-        while (it.hasNext()) {
-            final Window w = it.next();
+        for (Window w : windows) {
             nodesCount += countNodes(w.getScene().getRoot());
-
         }
     }
 
diff --git a/modules/jmx/src/test/java/com/oracle/javafx/jmx/SGMXBean_windows_Test.java b/modules/jmx/src/test/java/com/oracle/javafx/jmx/SGMXBean_windows_Test.java
--- a/modules/jmx/src/test/java/com/oracle/javafx/jmx/SGMXBean_windows_Test.java
+++ b/modules/jmx/src/test/java/com/oracle/javafx/jmx/SGMXBean_windows_Test.java
@@ -42,6 +42,7 @@
 import java.util.HashSet;
 import java.util.Iterator;
 import java.util.Set;
+import java.util.List;
 
 public class SGMXBean_windows_Test {
 
@@ -66,12 +67,8 @@
         stage2.setScene(scene2);
         stage2.show();
 
-        final Iterator<Window> it = Window.impl_getWindows();
-        windowsCount = 0;
-        while (it.hasNext()) {
-            windowsCount++;
-            it.next();
-        }
+        final List<Window> windows = Window.getWindows();
+        windowsCount = windows.size();
     }
 
     private static JSONDocument getJSONDocument(String source) {