diff --git a/platform/platform-api/src/com/intellij/util/ui/ButtonlessScrollBarUI.java b/platform/platform-api/src/com/intellij/util/ui/ButtonlessScrollBarUI.java
index 384ad56dd92f..79c3a07b51b2 100644
--- a/platform/platform-api/src/com/intellij/util/ui/ButtonlessScrollBarUI.java
+++ b/platform/platform-api/src/com/intellij/util/ui/ButtonlessScrollBarUI.java
@@ -16,13 +16,11 @@
 package com.intellij.util.ui;
 
 import com.intellij.openapi.util.Disposer;
-import com.intellij.openapi.util.SystemInfo;
 import com.intellij.openapi.util.registry.Registry;
 import com.intellij.ui.Gray;
 import com.intellij.ui.JBColor;
 import com.intellij.ui.LightColors;
 import com.intellij.ui.components.JBScrollPane;
-import org.jetbrains.annotations.NotNull;
 
 import javax.swing.*;
 import javax.swing.event.ChangeEvent;
@@ -166,7 +164,7 @@ public class ButtonlessScrollBarUI extends BasicScrollBarUI {
     };
     myNSScrollerListener = new NSScrollerHelper.ScrollbarStyleListener() {
       @Override
-      public void styleChanged(@NotNull NSScrollerHelper.Style newStyle) {
+      public void styleChanged() {
         updateMacScrollbarStyle();
       }
     };
@@ -177,11 +175,7 @@ public class ButtonlessScrollBarUI extends BasicScrollBarUI {
   }
 
   private void updateMacScrollbarStyle() {
-    if (!SystemInfo.isMac) return;
-
-    NSScrollerHelper.Style style = UIUtil.isUnderNativeMacLookAndFeel() && !Registry.is("ui.no.mac.scrollbar")
-                                   ? NSScrollerHelper.getScrollerStyle()
-                                   : null;
+    NSScrollerHelper.Style style = NSScrollerHelper.getScrollerStyle();
 
     if (style != myMacScrollerStyle && scrollbar != null) {
       myMacScrollerStyle = style;
@@ -193,7 +187,7 @@ public class ButtonlessScrollBarUI extends BasicScrollBarUI {
       if (pane != null) pane.revalidate();
     }
   }
-  
+
   public boolean alwaysShowTrack() {
     return !isMacOverlayScrollbar();
   }
diff --git a/platform/platform-api/src/com/intellij/util/ui/NSScrollerHelper.java b/platform/platform-api/src/com/intellij/util/ui/NSScrollerHelper.java
index 5040073673f1..29dd033ecd48 100644
--- a/platform/platform-api/src/com/intellij/util/ui/NSScrollerHelper.java
+++ b/platform/platform-api/src/com/intellij/util/ui/NSScrollerHelper.java
@@ -21,6 +21,7 @@ import com.intellij.ui.mac.foundation.ID;
 import com.sun.jna.Callback;
 import com.sun.jna.Pointer;
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 
 import javax.swing.event.EventListenerList;
 import java.util.EventListener;
@@ -31,11 +32,10 @@ class NSScrollerHelper {
   private static final Callback CALLBACK = new Callback() {
     @SuppressWarnings("UnusedDeclaration")
     public void callback(ID self, Pointer selector, ID event) {
-      final Style style = getScrollerStyle();
       UIUtil.invokeLaterIfNeeded(new Runnable() {
         @Override
         public void run() {
-          fireStyleChanged(style);
+          fireStyleChanged();
         }
       });
     }
@@ -75,9 +75,9 @@ class NSScrollerHelper {
     }
   }
 
-  @NotNull
+  @Nullable
   public static Style getScrollerStyle() {
-    if (!SystemInfo.isMac) return Style.Legacy;
+    if (!SystemInfo.isMac) return null;
 
     Foundation.NSAutoreleasePool pool = new Foundation.NSAutoreleasePool();
     try {
@@ -101,16 +101,16 @@ class NSScrollerHelper {
     ourListeners.remove(ScrollbarStyleListener.class, listener);
   }
 
-  private static void fireStyleChanged(@NotNull Style style) {
+  private static void fireStyleChanged() {
     Object[] listeners = ourListeners.getListenerList();
     for (int i = listeners.length - 2; i >= 0; i -= 2) {
       if (listeners[i] == ScrollbarStyleListener.class) {
-        ((ScrollbarStyleListener)listeners[i + 1]).styleChanged(style);
+        ((ScrollbarStyleListener)listeners[i + 1]).styleChanged();
       }
     }
   }
 
   public interface ScrollbarStyleListener extends EventListener {
-    void styleChanged(@NotNull Style newStyle);
+    void styleChanged();
   }
 }
diff --git a/platform/platform-resources-en/src/misc/registry.properties b/platform/platform-resources-en/src/misc/registry.properties
index cfe55242b539..108038f029ea 100644
--- a/platform/platform-resources-en/src/misc/registry.properties
+++ b/platform/platform-resources-en/src/misc/registry.properties
@@ -378,5 +378,4 @@ dsm.retina.darcula.legend.description=Experimental DSM legend component
 ide.scratch.enabled=false
 
 editor.injected.highlighting.enabled=true
-editor.injected.highlighting.enabled.description=Disables injected fragments highlighting (requires project reopening)
-ui.no.mac.scrollbar=false
+editor.injected.highlighting.enabled.description=Disables injected fragments highlighting (requires project reopening)
\ No newline at end of file