diff --git a/Sources/ProcessBarMonitor/LegacyLaunchAgentCleaner.swift b/Sources/ProcessBarMonitor/LegacyLaunchAgentCleaner.swift
new file mode 100644
index 0000000..d195a19
--- /dev/null
+++ b/Sources/ProcessBarMonitor/LegacyLaunchAgentCleaner.swift
@@ -0,0 +1,47 @@
+import Foundation
+
+struct LegacyLaunchAgentCleanupResult {
+    let removed: Bool
+    let messageKey: String?
+    let details: String?
+}
+
+enum LegacyLaunchAgentCleaner {
+    static let legacyLabel = "ai.openclaw.ProcessBarMonitor"
+
+    static func cleanupIfNeeded(
+        fileManager: FileManager = .default,
+        processRunner: ((String, [String]) throws -> Int32)? = nil
+    ) -> LegacyLaunchAgentCleanupResult {
+        let plistPath = (NSHomeDirectory() as NSString).appendingPathComponent("Library/LaunchAgents/\(legacyLabel).plist")
+        guard fileManager.fileExists(atPath: plistPath) else {
+            return LegacyLaunchAgentCleanupResult(removed: false, messageKey: nil, details: nil)
+        }
+
+        let runner = processRunner ?? runProcess
+        do {
+            _ = try? runner("/bin/launchctl", ["bootout", "gui/\(getuid())", plistPath])
+            try fileManager.removeItem(atPath: plistPath)
+            return LegacyLaunchAgentCleanupResult(
+                removed: true,
+                messageKey: "status.legacy_launch_agent_removed",
+                details: nil
+            )
+        } catch {
+            return LegacyLaunchAgentCleanupResult(
+                removed: false,
+                messageKey: "status.legacy_launch_agent_remove_failed",
+                details: error.localizedDescription
+            )
+        }
+    }
+
+    private static func runProcess(_ launchPath: String, _ arguments: [String]) throws -> Int32 {
+        let process = Process()
+        process.executableURL = URL(fileURLWithPath: launchPath)
+        process.arguments = arguments
+        try process.run()
+        process.waitUntilExit()
+        return process.terminationStatus
+    }
+}
diff --git a/Sources/ProcessBarMonitor/MonitorViewModel.swift b/Sources/ProcessBarMonitor/MonitorViewModel.swift
index b1828f4..136d07a 100644
--- a/Sources/ProcessBarMonitor/MonitorViewModel.swift
+++ b/Sources/ProcessBarMonitor/MonitorViewModel.swift
@@ -108,6 +108,17 @@ final class MonitorViewModel: ObservableObject {
 
     func start() {
         guard refreshTask == nil else { return }
+
+        let legacyCleanup = LegacyLaunchAgentCleaner.cleanupIfNeeded()
+        if let messageKey = legacyCleanup.messageKey {
+            if let details = legacyCleanup.details {
+                statusMessage = L10n.format(messageKey, details)
+            } else {
+                statusMessage = L10n.string(messageKey)
+            }
+        }
+        launchAtLogin.refreshState()
+
         refreshTask = Task { [weak self] in
             await self?.refresh(forceProcesses: true)
             while !Task.isCancelled {
diff --git a/Sources/ProcessBarMonitor/Resources/en.lproj/Localizable.strings b/Sources/ProcessBarMonitor/Resources/en.lproj/Localizable.strings
index da71afa..ff6c5b1 100644
--- a/Sources/ProcessBarMonitor/Resources/en.lproj/Localizable.strings
+++ b/Sources/ProcessBarMonitor/Resources/en.lproj/Localizable.strings
@@ -31,6 +31,8 @@
 "status.failed_to_load_top_apps" = "Failed to load top apps: %@";
 "status.launch_at_login_enabled" = "Launch at login enabled.";
 "status.launch_at_login_disabled" = "Launch at login disabled.";
+"status.legacy_launch_agent_removed" = "Removed a leftover legacy login LaunchAgent so the app will no longer start twice.";
+"status.legacy_launch_agent_remove_failed" = "Found a leftover legacy login LaunchAgent but could not remove it automatically: %@";
 "thermal.nominal" = "Nominal";
 "thermal.fair" = "Fair";
 "thermal.serious" = "Serious";
diff --git a/Sources/ProcessBarMonitor/Resources/zh-Hans.lproj/Localizable.strings b/Sources/ProcessBarMonitor/Resources/zh-Hans.lproj/Localizable.strings
index 9643c4b..3d8e65e 100644
--- a/Sources/ProcessBarMonitor/Resources/zh-Hans.lproj/Localizable.strings
+++ b/Sources/ProcessBarMonitor/Resources/zh-Hans.lproj/Localizable.strings
@@ -31,6 +31,8 @@
 "status.failed_to_load_top_apps" = "加载 Top Apps 失败：%@";
 "status.launch_at_login_enabled" = "已启用开机启动。";
 "status.launch_at_login_disabled" = "已关闭开机启动。";
+"status.legacy_launch_agent_removed" = "已清理遗留的旧版开机启动项，应用之后不会再因此重复启动。";
+"status.legacy_launch_agent_remove_failed" = "发现遗留的旧版开机启动项，但自动清理失败：%@";
 "thermal.nominal" = "正常";
 "thermal.fair" = "一般";
 "thermal.serious" = "较高";