diff --git a/client/macos/PacketTunnel/PacketTunnelProvider.swift b/client/macos/PacketTunnel/PacketTunnelProvider.swift
index 1d1d348..682cf73 100644
--- a/client/macos/PacketTunnel/PacketTunnelProvider.swift
+++ b/client/macos/PacketTunnel/PacketTunnelProvider.swift
@@ -33,7 +33,14 @@ final class PacketTunnelProvider: NEPacketTunnelProvider {
         DispatchQueue.global(qos: .userInitiated).async { [weak self] in
             guard let self else { return }
             do {
-                let configContent = try self.resolveConfig(options)
+                // urltest 延迟走 clash API:服务端下发的配置没有 clash_api,sing-box 不暴露
+                // 出站组/urltest 历史 → libbox Group 命令返回空 → 连接页延迟为 —。这里在扩展内
+                // 注入 clash_api(127.0.0.1 本地监听)+ cache_file,StatsCollector 经本地 HTTP
+                // 查 /proxies + /group/<name>/delay 取真实延迟(与 Windows 同法)。
+                let clashPort = Int.random(in: 20000...60000)
+                let clashSecret = UUID().uuidString
+                let configContent = Self.injectClashApi(try self.resolveConfig(options),
+                                                        port: clashPort, secret: clashSecret)
 
                 // libbox 数据目录用扩展自己的 App Group 容器(root 运行 → /var/root/...)。
                 // ⚠️ 不要试图把它指向用户容器:扩展以 root 运行,command.sock 的目录/属主
@@ -69,9 +76,8 @@ final class PacketTunnelProvider: NEPacketTunnelProvider {
                 try server.startOrReloadService(configContent, options: LibboxOverrideOptions())
                 self.commandServer = server
 
-                // 进程内 stats 采集:连本进程自己的 command.sock(同容器,root 可达),
-                // 缓存最新上/下行 + urltest,供 handleAppMessage 回给主 app。
-                self.stats.start()
+                // 进程内 stats 采集:libbox command.sock 取上/下行;clash API 取 urltest 延迟。
+                self.stats.start(clashPort: clashPort, clashSecret: clashSecret)
 
                 log.info("startTunnel: service started")
                 completionHandler(nil)
@@ -108,6 +114,27 @@ final class PacketTunnelProvider: NEPacketTunnelProvider {
         }
     }
 
+    // 在 sing-box 配置里注入 experimental.clash_api(本地监听)+ cache_file,让内核暴露
+    // 出站组/urltest 历史,供 StatsCollector 经本地 HTTP 取真实延迟。已有则不覆盖。
+    static func injectClashApi(_ configJSON: String, port: Int, secret: String) -> String {
+        guard var root = (try? JSONSerialization.jsonObject(with: Data(configJSON.utf8)))
+            as? [String: Any] else { return configJSON }
+        var experimental = (root["experimental"] as? [String: Any]) ?? [:]
+        if experimental["clash_api"] == nil {
+            experimental["clash_api"] = [
+                "external_controller": "127.0.0.1:\(port)",
+                "secret": secret,
+            ]
+        }
+        if experimental["cache_file"] == nil {
+            experimental["cache_file"] = ["enabled": true]
+        }
+        root["experimental"] = experimental
+        guard let data = try? JSONSerialization.data(withJSONObject: root),
+              let out = String(data: data, encoding: .utf8) else { return configJSON }
+        return out
+    }
+
     private func resolveConfig(_ options: [String: NSObject]?) throws -> String {
         if let inline = options?["configContent"] as? String, !inline.isEmpty {
             return inline
@@ -338,24 +365,26 @@ private func simpleError(_ msg: String) -> NSError {
     NSError(domain: "pangolin.tunnel", code: 1, userInfo: [NSLocalizedDescriptionKey: msg])
 }
 
-// ── StatsCollector:扩展进程内的 libbox 命令客户端 ───────────────────────────
-// 连「本进程自己的」command.sock(同容器、root 可达,无跨进程/跨用户问题),订阅
-// status/group,缓存最新上/下行 + urltest;由 handleAppMessage 回给主 app。等价于旧的
-// 主 app 端 StatsClient,但跑在扩展里——根治主 app 跨 root/用户容器连不上 socket 的死局。
+// ── StatsCollector:扩展进程内统计采集 ──────────────────────────────────────
+// 上/下行速率:连本进程自己的 command.sock(libbox Status 命令)。
+// urltest 延迟:经注入的 clash API(本地 HTTP)查 /proxies + /group/<name>/delay——
+//   服务端配置无 clash_api,sing-box 不暴露组/urltest 历史,libbox Group 命令返回空;
+//   注入 clash_api 后用与 Windows 完全一致的取法(getGroupDelay)拿内核实测延迟。
+// 缓存的 latest 由 handleAppMessage 回给主 app。
 final class StatsCollector: NSObject {
     private let queue = DispatchQueue(label: "pangolin.stats.collector")
-    // ⚠️ libbox 的 command 协议是「一连接一命令」:一个 client 只订阅一种命令。把 Status 与
-    // Group addCommand 到同一 client,只有第一种(Status)生效,Group 永不回调 → urltest 为空、
-    // 连接页延迟显示 —。对齐 sing-box-for-apple:每种命令各开一个 client。
     private var statusClient: LibboxCommandClient?
-    private var groupClient: LibboxCommandClient?
     private var started = false
-    private var urlTestTimer: DispatchSourceTimer?
+    private var clashTimer: DispatchSourceTimer?
+
+    // clash API(扩展内注入,127.0.0.1 本地监听):取出站组 urltest 真实延迟。
+    private var clashBase = ""
+    private var clashSecret = ""
+    private var groupNames: [String] = []
 
     private let lock = NSLock()
     private var latest: [String: Any] = StatsCollector.zero
     private var latestUrltest: [(tag: String, delayMs: Int)] = []
-    private var groupTags: [String] = []
 
     private static let zero: [String: Any] = [
         "uploadBytes": 0, "downloadBytes": 0,
@@ -363,52 +392,42 @@ final class StatsCollector: NSObject {
         "urltestResults": [[String: Any]](),
     ]
 
-    func start() {
+    func start(clashPort: Int, clashSecret: String) {
         queue.async { [weak self] in
             guard let self, !self.started else { return }
-            self.statusClient = self.connectClient(command: LibboxCommandStatus, label: "status")
-            self.groupClient = self.connectClient(command: LibboxCommandGroup, label: "group")
-            guard self.statusClient != nil || self.groupClient != nil else { return }
+            self.clashBase = "http://127.0.0.1:\(clashPort)"
+            self.clashSecret = clashSecret
+            self.statusClient = self.connectStatusClient()
             self.started = true
-            self.startUrlTestTimer()
+            self.startClashTimer()
         }
     }
 
-    /// 为单一命令开一个 client 并连上(command.sock 刚建好可能稍滞后,重试)。
-    private func connectClient(command: Int32, label: String) -> LibboxCommandClient? {
+    /// libbox Status client(取速率)。command.sock 刚建好可能稍滞后,重试。
+    private func connectStatusClient() -> LibboxCommandClient? {
         let options = LibboxCommandClientOptions()
         options.statusInterval = 1_000_000_000 // 1s
-        options.addCommand(command)
-        guard let c = LibboxNewCommandClient(self, options) else {
-            NSLog("[pangolin/collector] %@ LibboxNewCommandClient nil", label)
-            return nil
-        }
+        options.addCommand(LibboxCommandStatus)
+        guard let c = LibboxNewCommandClient(self, options) else { return nil }
         for _ in 0..<20 {
-            do {
-                try c.connect()
-                NSLog("[pangolin/collector] %@ connected", label)
-                return c
-            } catch {
-                Thread.sleep(forTimeInterval: 0.25)
-            }
+            do { try c.connect(); NSLog("[pangolin/collector] status connected"); return c }
+            catch { Thread.sleep(forTimeInterval: 0.25) }
         }
-        NSLog("[pangolin/collector] %@ gave up connecting", label)
+        NSLog("[pangolin/collector] status gave up")
         return nil
     }
 
     func stop() {
         queue.async { [weak self] in
             guard let self else { return }
-            self.urlTestTimer?.cancel(); self.urlTestTimer = nil
+            self.clashTimer?.cancel(); self.clashTimer = nil
             if let c = self.statusClient { try? c.disconnect() }
-            if let c = self.groupClient { try? c.disconnect() }
             self.statusClient = nil
-            self.groupClient = nil
             self.started = false
+            self.groupNames = []
             self.lock.lock()
             self.latest = StatsCollector.zero
             self.latestUrltest = []
-            self.groupTags = []
             self.lock.unlock()
         }
     }
@@ -418,17 +437,86 @@ final class StatsCollector: NSObject {
         return (try? JSONSerialization.data(withJSONObject: snap)) ?? Data("{}".utf8)
     }
 
-    private func startUrlTestTimer() {
-        urlTestTimer?.cancel()
+    // ── clash API 轮询:取 urltest 延迟(与 Windows getGroupDelay 同法)─────────
+    private func startClashTimer() {
         let timer = DispatchSource.makeTimerSource(queue: queue)
-        timer.schedule(deadline: .now() + 2, repeating: 10)
-        timer.setEventHandler { [weak self] in
-            guard let self, let c = self.groupClient else { return }
-            // groupTags 由 writeGroups 回调填充;主动触发各组 urltest,补偿 sing-box 惰性探测。
-            for tag in self.groupTags { try? c.urlTest(tag) }
-        }
+        timer.schedule(deadline: .now() + 3, repeating: 8)
+        timer.setEventHandler { [weak self] in self?.pollClash() }
         timer.resume()
-        urlTestTimer = timer
+        clashTimer = timer
+    }
+
+    private func pollClash() {
+        if groupNames.isEmpty {
+            clashGet("/proxies", query: nil) { [weak self] obj in
+                guard let self else { return }
+                let names = StatsCollector.extractUrltestGroups(obj)
+                self.queue.async {
+                    self.groupNames = names
+                    self.setDiag("groups=\(names)")
+                    self.triggerGroupDelays()
+                }
+            }
+        } else {
+            triggerGroupDelays()
+        }
+    }
+
+    private func triggerGroupDelays() {
+        for name in groupNames {
+            clashGet("/group/\(name)/delay",
+                     query: ["url": "http://www.gstatic.com/generate_204", "timeout": "3000"]) { [weak self] obj in
+                guard let self, let dict = obj as? [String: Any] else { return }
+                var urltest: [(tag: String, delayMs: Int)] = []
+                for (tag, v) in dict {
+                    if let d = (v as? NSNumber)?.intValue { urltest.append((tag: tag, delayMs: d)) }
+                }
+                let summary = urltest.map { "\($0.tag):\($0.delayMs)" }.joined(separator: ",")
+                NSLog("[pangolin/collector] kernel delay(%@)=%@", name, summary) // 内核侧实测打点
+                self.queue.async {
+                    self.lock.lock()
+                    self.latestUrltest = urltest
+                    self.latest["urltestResults"] = urltest.map { ["tag": $0.tag, "delayMs": $0.delayMs] }
+                    self.latest["diag"] = "delay(\(name))=\(summary)"
+                    self.lock.unlock()
+                }
+            }
+        }
+    }
+
+    private func setDiag(_ s: String) {
+        lock.lock(); latest["diag"] = s; lock.unlock()
+    }
+
+    private func clashGet(_ path: String, query: [String: String]?,
+                          completion: @escaping (Any?) -> Void) {
+        guard var comps = URLComponents(string: clashBase + path) else { completion(nil); return }
+        if let query { comps.queryItems = query.map { URLQueryItem(name: $0.key, value: $0.value) } }
+        guard let url = comps.url else { completion(nil); return }
+        var req = URLRequest(url: url)
+        req.timeoutInterval = 8
+        if !clashSecret.isEmpty {
+            req.setValue("Bearer \(clashSecret)", forHTTPHeaderField: "Authorization")
+        }
+        URLSession.shared.dataTask(with: req) { data, _, err in
+            if let err { NSLog("[pangolin/collector] clash %@ err=%@", path, err.localizedDescription) }
+            guard let data else { completion(nil); return }
+            completion(try? JSONSerialization.jsonObject(with: data))
+        }.resume()
+    }
+
+    /// 从 /proxies 提取 URLTest/Fallback 组名(clash 约定类型名首字母大写)。
+    static func extractUrltestGroups(_ obj: Any?) -> [String] {
+        guard let root = obj as? [String: Any],
+              let proxies = root["proxies"] as? [String: Any] else { return [] }
+        var names: [String] = []
+        for (name, v) in proxies {
+            if let m = v as? [String: Any], let type = m["type"] as? String,
+               type == "URLTest" || type == "Fallback" {
+                names.append(name)
+            }
+        }
+        return names
     }
 }
 
@@ -444,34 +532,14 @@ extension StatsCollector: LibboxCommandClientHandlerProtocol {
 
     func writeStatus(_ message: LibboxStatusMessage?) {
         guard let m = message else { return }
+        // 逐键更新(不整盘重建),保留 clash 轮询写入的 urltestResults / diag。
         lock.lock()
-        latest = [
-            "uploadBytes": m.uplinkTotal,
-            "downloadBytes": m.downlinkTotal,
-            "uploadSpeed": Double(m.uplink),
-            "downloadSpeed": Double(m.downlink),
-            "urltestResults": latestUrltest.map { ["tag": $0.tag, "delayMs": $0.delayMs] },
-        ]
+        latest["uploadBytes"] = m.uplinkTotal
+        latest["downloadBytes"] = m.downlinkTotal
+        latest["uploadSpeed"] = Double(m.uplink)
+        latest["downloadSpeed"] = Double(m.downlink)
         lock.unlock()
     }
 
-    func writeGroups(_ message: (any LibboxOutboundGroupIteratorProtocol)?) {
-        guard let groups = message else { return }
-        var urltest: [(tag: String, delayMs: Int)] = []
-        var tags: [String] = []
-        while groups.hasNext() {
-            guard let group = groups.next() else { break }
-            tags.append(group.tag)
-            guard let items = group.getItems() else { continue }
-            while items.hasNext() {
-                guard let item = items.next() else { break }
-                urltest.append((tag: item.tag, delayMs: Int(item.urlTestDelay)))
-            }
-        }
-        lock.lock()
-        latestUrltest = urltest
-        latest["urltestResults"] = urltest.map { ["tag": $0.tag, "delayMs": $0.delayMs] }
-        lock.unlock()
-        queue.async { [weak self] in self?.groupTags = tags }
-    }
+    func writeGroups(_ message: (any LibboxOutboundGroupIteratorProtocol)?) {}
 }
diff --git a/client/macos/Runner.xcodeproj/project.pbxproj b/client/macos/Runner.xcodeproj/project.pbxproj
index 334eb06..a3e2a2e 100644
--- a/client/macos/Runner.xcodeproj/project.pbxproj
+++ b/client/macos/Runner.xcodeproj/project.pbxproj
@@ -659,7 +659,7 @@
 			baseConfigurationReference = C57BBFD43F9175D1E23685EF /* Pods-RunnerTests.debug.xcconfig */;
 			buildSettings = {
 				BUNDLE_LOADER = "$(TEST_HOST)";
-				CURRENT_PROJECT_VERSION = 46;
+				CURRENT_PROJECT_VERSION = 47;
 				GENERATE_INFOPLIST_FILE = YES;
 				MARKETING_VERSION = 1.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.pangolin.pangolin.RunnerTests;
@@ -674,7 +674,7 @@
 			baseConfigurationReference = F8904897A48DC81799B8752E /* Pods-RunnerTests.release.xcconfig */;
 			buildSettings = {
 				BUNDLE_LOADER = "$(TEST_HOST)";
-				CURRENT_PROJECT_VERSION = 46;
+				CURRENT_PROJECT_VERSION = 47;
 				GENERATE_INFOPLIST_FILE = YES;
 				MARKETING_VERSION = 1.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.pangolin.pangolin.RunnerTests;
@@ -689,7 +689,7 @@
 			baseConfigurationReference = B21E68FC1F5D33DD67A0DF5E /* Pods-RunnerTests.profile.xcconfig */;
 			buildSettings = {
 				BUNDLE_LOADER = "$(TEST_HOST)";
-				CURRENT_PROJECT_VERSION = 46;
+				CURRENT_PROJECT_VERSION = 47;
 				GENERATE_INFOPLIST_FILE = YES;
 				MARKETING_VERSION = 1.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.pangolin.pangolin.RunnerTests;
@@ -960,7 +960,7 @@
 				CODE_SIGN_ENTITLEMENTS = PacketTunnel/PacketTunnel.entitlements;
 				CODE_SIGN_IDENTITY = "Apple Development";
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 46;
+				CURRENT_PROJECT_VERSION = 47;
 				DEVELOPMENT_TEAM = BYL4KQHMTN;
 				ENABLE_APP_SANDBOX = YES;
 				ENABLE_HARDENED_RUNTIME = YES;
@@ -1010,7 +1010,7 @@
 				CODE_SIGN_ENTITLEMENTS = PacketTunnel/PacketTunnel.entitlements;
 				CODE_SIGN_IDENTITY = "Developer ID Application";
 				CODE_SIGN_STYLE = Manual;
-				CURRENT_PROJECT_VERSION = 46;
+				CURRENT_PROJECT_VERSION = 47;
 				DEVELOPMENT_TEAM = BYL4KQHMTN;
 				ENABLE_APP_SANDBOX = YES;
 				ENABLE_HARDENED_RUNTIME = YES;
@@ -1059,7 +1059,7 @@
 				CODE_SIGN_ENTITLEMENTS = PacketTunnel/PacketTunnel.entitlements;
 				CODE_SIGN_IDENTITY = "Apple Development";
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 46;
+				CURRENT_PROJECT_VERSION = 47;
 				DEVELOPMENT_TEAM = BYL4KQHMTN;
 				ENABLE_APP_SANDBOX = YES;
 				ENABLE_HARDENED_RUNTIME = YES;
diff --git a/client/macos/Runner/StatsClient.swift b/client/macos/Runner/StatsClient.swift
index 265128f..e5b190a 100644
--- a/client/macos/Runner/StatsClient.swift
+++ b/client/macos/Runner/StatsClient.swift
@@ -67,8 +67,9 @@ final class StatsClient: NSObject {
                 if self.diagTick % 5 == 0 {
                     let urls = (obj["urltestResults"] as? [[String: Any]]) ?? []
                     let pairs = urls.map { "\($0["tag"] ?? "?")=\($0["delayMs"] ?? -1)" }.joined(separator: ",")
-                    NSLog("[pangolin/stats] dl=%@ ul=%@ urltest[%d]=%@",
-                          "\(obj["downloadSpeed"] ?? 0)", "\(obj["uploadSpeed"] ?? 0)", urls.count, pairs)
+                    NSLog("[pangolin/stats] dl=%@ ul=%@ urltest[%d]=%@ diag=%@",
+                          "\(obj["downloadSpeed"] ?? 0)", "\(obj["uploadSpeed"] ?? 0)", urls.count, pairs,
+                          "\(obj["diag"] ?? "-")")
                 }
                 self.emit(obj)
             }