diff --git a/source/net/filebot/Main.java b/source/net/filebot/Main.java
index d996cc4e..ea34a623 100644
--- a/source/net/filebot/Main.java
+++ b/source/net/filebot/Main.java
@@ -284,6 +284,7 @@ public class Main {
 
 		// window settings
 		if (Settings.isMacSandbox()) {
+			MacAppUtilities.setUIDefaults();
 			MacAppUtilities.setWindowCanFullScreen(frame);
 		}
 		frame.setLocationByPlatform(true);
diff --git a/source/net/filebot/mac/MacAppUtilities.java b/source/net/filebot/mac/MacAppUtilities.java
index 9f404987..b5c4d370 100644
--- a/source/net/filebot/mac/MacAppUtilities.java
+++ b/source/net/filebot/mac/MacAppUtilities.java
@@ -6,6 +6,8 @@ import java.lang.reflect.Method;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
+import javax.swing.UIManager;
+
 import ca.weblite.objc.Client;
 
 public class MacAppUtilities {
@@ -23,7 +25,7 @@ public class MacAppUtilities {
 		return objc().sendProxy("NSData", "data").send("initWithBase64Encoding:", text);
 	}
 
-	public static Object NSURL_bookmarkDataWithOptions(String path) {
+	public static String NSURL_bookmarkDataWithOptions(String path) {
 		return objc().sendProxy("NSURL", "fileURLWithPath:", path).sendProxy("bookmarkDataWithOptions:includingResourceValuesForKeys:relativeToURL:error:", 2048, null, null, null).sendString("base64Encoding");
 	}
 
@@ -52,6 +54,10 @@ public class MacAppUtilities {
 		}
 	}
 
+	public static void setUIDefaults() {
+		UIManager.put("TitledBorder.border", UIManager.getBorder("InsetBorder.aquaVariant"));
+	}
+
 	public static boolean isLockedFolder(File folder) {
 		return folder.isDirectory() && !folder.canRead() && !folder.canWrite();
 	}