diff --git a/chemclipse/plugins/org.eclipse.chemclipse.support.ui/src/org/eclipse/chemclipse/support/ui/workbench/PreferencesSupport.java b/chemclipse/plugins/org.eclipse.chemclipse.support.ui/src/org/eclipse/chemclipse/support/ui/workbench/PreferencesSupport.java
index 8b6fd776fa..44ef073398 100644
--- a/chemclipse/plugins/org.eclipse.chemclipse.support.ui/src/org/eclipse/chemclipse/support/ui/workbench/PreferencesSupport.java
+++ b/chemclipse/plugins/org.eclipse.chemclipse.support.ui/src/org/eclipse/chemclipse/support/ui/workbench/PreferencesSupport.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2017, 2023 Lablicate GmbH.
+ * Copyright (c) 2017, 2024 Lablicate GmbH.
  *
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
@@ -14,9 +14,14 @@
 import java.util.ArrayList;
 import java.util.List;
 
+import org.eclipse.chemclipse.support.settings.OperatingSystemUtils;
 import org.eclipse.core.runtime.Platform;
 import org.eclipse.jface.preference.IPreferenceNode;
 import org.eclipse.jface.preference.PreferenceManager;
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.graphics.Color;
+import org.eclipse.swt.graphics.RGB;
+import org.eclipse.swt.widgets.Display;
 import org.eclipse.ui.PlatformUI;
 
 public class PreferencesSupport {
@@ -36,7 +41,13 @@ public static void cleanPreferencesByNodeId(List<String> preservePreferenceNodes
 	// Workaround for https://bugs.eclipse.org/bugs/show_bug.cgi?id=564022
 	public static boolean isDarkTheme() {
 
-		return Platform.getPreferencesService().getString("org.eclipse.e4.ui.css.swt.theme", "themeid", "", null).endsWith("dark");
+		if(OperatingSystemUtils.isMac()) {
+			Color background = Display.getDefault().getSystemColor(SWT.COLOR_WIDGET_BACKGROUND);
+			RGB rgb = background.getRGB();
+			return (rgb.red < 128 && rgb.green < 128 && rgb.blue < 128);
+		} else {
+			return Platform.getPreferencesService().getString("org.eclipse.e4.ui.css.swt.theme", "themeid", "", null).endsWith("dark");
+		}
 	}
 
 	/**