diff --git a/src/main/java/name/nathanmcrae/numbersstation/StationSettingsController.java b/src/main/java/name/nathanmcrae/numbersstation/StationSettingsController.java
index d8d41e0..5041f1f 100644
--- a/src/main/java/name/nathanmcrae/numbersstation/StationSettingsController.java
+++ b/src/main/java/name/nathanmcrae/numbersstation/StationSettingsController.java
@@ -462,8 +462,14 @@ public class StationSettingsController {
         } else if (osName.contains("nix") || osName.contains("nux") || osName.contains("aix")) {
             LinuxScheduler.registerSchedule(settings);
         } else {
-            logger.log(Level.SEVERE, "Unsupported OS " + osName);
-            // TODO: Alert
+            String message = "Unsupported OS " + osName;
+            logger.log(Level.SEVERE, message);
+
+            Alert alert = new Alert(Alert.AlertType.ERROR);
+            alert.setTitle(message);
+            alert.setHeaderText(null);
+            alert.setContentText(message);
+            alert.showAndWait();
         }
 
         Node node = (Node) e.getSource();