diff --git a/libs/hbb_common/examples/system_message.rs b/libs/hbb_common/examples/system_message.rs
index 347bec47f..0be788428 100644
--- a/libs/hbb_common/examples/system_message.rs
+++ b/libs/hbb_common/examples/system_message.rs
@@ -6,14 +6,15 @@ use hbb_common::platform::macos;
 
 fn main() {
     #[cfg(target_os = "linux")]
-    linux::system_message("test title", "test message", true).ok();
+    let res = linux::system_message("test title", "test message", true);
     #[cfg(target_os = "macos")]
-    macos::alert(
-        "RustDesk".to_owned(),
+    let res = macos::alert(
+        "System Preferences".to_owned(),
         "warning".to_owned(),
         "test title".to_owned(),
         "test message".to_owned(),
         ["Ok".to_owned()].to_vec(),
-    )
-    .ok();
+    );
+    #[cfg(any(target_os = "linux", target_os = "macos"))]
+    println!("result {:?}", &res);
 }
diff --git a/libs/hbb_common/src/platform/mod.rs b/libs/hbb_common/src/platform/mod.rs
index 89a3a1569..b65980c1a 100644
--- a/libs/hbb_common/src/platform/mod.rs
+++ b/libs/hbb_common/src/platform/mod.rs
@@ -40,15 +40,25 @@ extern "C" fn breakdown_signal_handler(sig: i32) {
             true,
         )
         .ok();
-        #[cfg(target_os = "macos")]
-        macos::alert(
-            "RustDesk".to_owned(),
-            "critical".to_owned(),
-            "Crashed".to_owned(),
-            format!("Got signal {} and exit.{}", sig, info),
-            ["Ok".to_owned()].to_vec(),
-        )
-        .ok();
+        // Ignore alert info for now.
+        // #[cfg(target_os = "macos")]
+        // {
+        //     use std::sync::mpsc::channel;
+        //     use std::time::Duration;
+        //     let (tx, rx) = channel();
+        //     std::thread::spawn(move || {
+        //         macos::alert(
+        //             "System Preferences".to_owned(),
+        //             "critical".to_owned(),
+        //             "RustDesk Crashed".to_owned(),
+        //             format!("Got signal {} and exit.{}", sig, info),
+        //             ["Ok".to_owned()].to_vec(),
+        //         )
+        //         .ok();
+        //         let _ = tx.send(());
+        //     });
+        //     let _ = rx.recv_timeout(Duration::from_millis(1_000));
+        // }
     }
     exit(0);
 }