diff --git a/src/net/azib/ipscan/gui/GUI.java b/src/net/azib/ipscan/gui/GUI.java
index 5914c678..70b6c0d8 100644
--- a/src/net/azib/ipscan/gui/GUI.java
+++ b/src/net/azib/ipscan/gui/GUI.java
@@ -2,16 +2,19 @@ package net.azib.ipscan.gui;
 
 import net.azib.ipscan.config.LoggerFactory;
 import net.azib.ipscan.config.MainComponent;
+import net.azib.ipscan.config.Platform;
 import net.azib.ipscan.config.Version;
 import net.azib.ipscan.core.UserErrorException;
 import net.azib.ipscan.util.GoogleAnalytics;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.SWTError;
 import org.eclipse.swt.SWTException;
+import org.eclipse.swt.internal.cocoa.OS;
 import org.eclipse.swt.widgets.Display;
 import org.eclipse.swt.widgets.MessageBox;
 import org.eclipse.swt.widgets.Shell;
 
+import java.lang.reflect.Method;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
@@ -42,6 +45,8 @@ public class GUI implements AutoCloseable {
 	public void showMainWindow(MainComponent mainComponent) {
 		// create the main window using dependency injection
 		mainWindow = mainComponent.createMainWindow();
+		if (Platform.MAC_OS) setMacDarkAppearanceIfNeeded();
+
 		LOG.fine("Main window created: " + (System.currentTimeMillis() - startTime));
 
 		while (!mainWindow.isDisposed()) {
@@ -60,6 +65,20 @@ public class GUI implements AutoCloseable {
 		}
 	}
 
+	private void setMacDarkAppearanceIfNeeded() {
+		try {
+			// changing the appearance works only after the shell has been created
+			OS.setTheme(OS.isSystemDarkAppearance());
+			// workaround for a bug in SWT: colors need to be reinited after changing the appearance
+			Method initColor = display.getClass().getDeclaredMethod("initColors");
+			initColor.setAccessible(true);
+			initColor.invoke(display);
+		}
+		catch (Exception e) {
+			e.printStackTrace();
+		}
+	}
+
 	public void showMessage(int flags, String title, String localizedMessage) {
 		Shell parent = Display.getDefault().getActiveShell();
 		if (parent == null) parent = mainWindow.getShell();