diff --git a/src/common.rs b/src/common.rs
index 03bce854b..111a6dce0 100644
--- a/src/common.rs
+++ b/src/common.rs
@@ -123,7 +123,7 @@ pub fn is_server() -> bool {
     *IS_SERVER
 }
 
-// Is server logic running. 
+// Is server logic running.
 #[inline]
 pub fn is_server_running() -> bool {
     *SERVER_RUNNING.read().unwrap()
@@ -1053,3 +1053,36 @@ pub async fn get_next_nonkeyexchange_msg(
     }
     None
 }
+
+pub fn check_process(arg: &str, same_uid: bool) -> bool {
+    use hbb_common::sysinfo::{ProcessExt, System, SystemExt};
+    let mut sys = System::new();
+    sys.refresh_processes();
+    let app = std::env::current_exe()
+        .unwrap_or_default()
+        .to_string_lossy()
+        .to_string();
+    if app.is_empty() {
+        return false;
+    }
+    let my_uid = sys
+        .process((std::process::id() as usize).into())
+        .map(|x| x.user_id())
+        .unwrap_or_default();
+    for (_, p) in sys.processes().iter() {
+        if same_uid && p.user_id() != my_uid {
+            continue;
+        }
+        if p.cmd().is_empty() || p.cmd()[0] != app {
+            continue;
+        }
+        if arg.is_empty() {
+            if p.cmd().len() == 1 {
+                return true;
+            }
+        } else if p.cmd().len() > 1 && p.cmd()[1] == arg {
+            return true;
+        }
+    }
+    false
+}
diff --git a/src/core_main.rs b/src/core_main.rs
index d886f615b..a86a3db6d 100644
--- a/src/core_main.rs
+++ b/src/core_main.rs
@@ -160,7 +160,9 @@ pub fn core_main() -> Option<Vec<String>> {
                 return None;
             }
         } else if args[0] == "--tray" {
-            crate::tray::start_tray();
+            if !crate::check_process("--tray", true) {
+                crate::tray::start_tray();
+            }
             return None;
         } else if args[0] == "--service" {
             log::info!("start --service");
diff --git a/src/platform/macos.rs b/src/platform/macos.rs
index 4e2253cd9..01779f5ca 100644
--- a/src/platform/macos.rs
+++ b/src/platform/macos.rs
@@ -577,19 +577,10 @@ pub fn hide_dock() {
 }
 
 fn check_main_window() -> bool {
-    use hbb_common::sysinfo::{ProcessExt, System, SystemExt};
-    let mut sys = System::new();
-    sys.refresh_processes();
-    let app = format!("/Applications/{}.app", crate::get_app_name());
-    let my_uid = sys
-        .process((std::process::id() as usize).into())
-        .map(|x| x.user_id())
-        .unwrap_or_default();
-    for (_, p) in sys.processes().iter() {
-        if p.cmd().len() == 1 && p.user_id() == my_uid && p.cmd()[0].contains(&app) {
-            return true;
-        }
+    if crate::check_process("", true) {
+        return true;
     }
+    let app = format!("/Applications/{}.app", crate::get_app_name());
     std::process::Command::new("open")
         .args(["-n", &app])
         .status()