diff --git a/Sources/App/AppDelegate.swift b/Sources/App/AppDelegate.swift
index bdd84c0..4721890 100644
--- a/Sources/App/AppDelegate.swift
+++ b/Sources/App/AppDelegate.swift
@@ -16,10 +16,65 @@ final class AppDelegate: NSObject, NSApplicationDelegate {
     func applicationDidFinishLaunching(_ notification: Notification) {
         NSApp.setActivationPolicy(.accessory)
 
-        // 启动按键监听
+        // 检查辅助功能权限
+        if !CGPreflightListenEventAccess() {
+            requestAccessibilityPermission()
+        } else {
+            startKeyMonitor()
+        }
+
+        print("[App] Ready")
+    }
+
+    // MARK: - Permissions
+
+    private func requestAccessibilityPermission() {
+        // 自动打开系统设置
+        NSWorkspace.shared.open(URL(string: "x-apple.systempreferences:com.apple.preference.security?Privacy_Accessibility")!)
+
+        // 显示提示
+        let alert = NSAlert()
+        alert.messageText = "需要辅助功能权限"
+        alert.informativeText = """
+        Voice Input 需要「辅助功能」权限才能监听 Fn 键。
+
+        系统设置已自动打开，请：
+        1. 点击左下角的锁并输入密码
+        2. 在列表中找到并勾选「VoiceInput」
+        3. 返回本应用
+
+        点击「继续」后，应用将每 2 秒检查一次权限状态。
+        """
+        alert.alertStyle = .informational
+        alert.addButton(withTitle: "继续")
+        alert.addButton(withTitle: "退出")
+
+        if alert.runModal() == .alertFirstButtonReturn {
+            // 轮询检查权限
+            Timer.scheduledTimer(withTimeInterval: 2.0, repeats: true) { [weak self] timer in
+                if CGPreflightListenEventAccess() {
+                    timer.invalidate()
+                    DispatchQueue.main.async {
+                        self?.startKeyMonitor()
+                        // 显示成功提示
+                        let successAlert = NSAlert()
+                        successAlert.messageText = "权限已授权"
+                        successAlert.informativeText = "辅助功能权限已开启，Voice Input 正在运行。"
+                        successAlert.alertStyle = .informational
+                        successAlert.runModal()
+                    }
+                }
+            }
+        } else {
+            NSApp.terminate(nil)
+        }
+    }
+
+    private func startKeyMonitor() {
         let started = keyMonitor.start()
         if !started {
-            showPermissionAlert()
+            print("[App] Failed to start key monitor")
+            return
         }
 
         keyMonitor.onFnDown = { [weak self] in
@@ -29,8 +84,6 @@ final class AppDelegate: NSObject, NSApplicationDelegate {
         keyMonitor.onFnUp = { [weak self] in
             self?.stopRecording()
         }
-
-        print("[App] Ready")
     }
 
     // MARK: - Recording
@@ -134,26 +187,6 @@ final class AppDelegate: NSObject, NSApplicationDelegate {
         finalTranscription = ""
     }
 
-    // MARK: - Permissions
-
-    private func showPermissionAlert() {
-        let alert = NSAlert()
-        alert.messageText = "Accessibility Permission Required"
-        alert.informativeText = """
-        Voice Input needs Accessibility permission to detect the Fn key globally.
-
-        Please go to System Settings > Privacy & Security > Accessibility
-        and enable Voice Input.
-        """
-        alert.alertStyle = .warning
-        alert.addButton(withTitle: "Open System Settings")
-        alert.addButton(withTitle: "Later")
-
-        if alert.runModal() == .alertFirstButtonReturn {
-            NSWorkspace.shared.open(URL(string: "x-apple.systempreferences:com.apple.preference.security?Privacy_Accessibility")!)
-        }
-    }
-
     func applicationWillTerminate(_ notification: Notification) {
         keyMonitor.stop()
         audioMonitor.stop()
diff --git a/VoiceInput-20260424.dmg b/VoiceInput-20260424.dmg
index 00cdf31..c03bfda 100644
Binary files a/VoiceInput-20260424.dmg and b/VoiceInput-20260424.dmg differ