diff --git a/client/macos/PacketTunnel/PacketTunnelProvider.swift b/client/macos/PacketTunnel/PacketTunnelProvider.swift
index f32fe49..09dfca9 100644
--- a/client/macos/PacketTunnel/PacketTunnelProvider.swift
+++ b/client/macos/PacketTunnel/PacketTunnelProvider.swift
@@ -380,7 +380,6 @@ final class StatsCollector: NSObject {
     // 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
@@ -424,7 +423,6 @@ final class StatsCollector: NSObject {
             if let c = self.statusClient { try? c.disconnect() }
             self.statusClient = nil
             self.started = false
-            self.groupNames = []
             self.lock.lock()
             self.latest = StatsCollector.zero
             self.latestUrltest = []
@@ -447,48 +445,25 @@ final class StatsCollector: NSObject {
     }
 
     private func pollClash() {
-        if groupNames.isEmpty {
-            clashGet("/proxies", query: nil) { [weak self] obj, raw in
-                guard let self else { return }
-                let names = StatsCollector.extractUrltestGroups(obj)
-                self.queue.async {
-                    self.groupNames = names
-                    if names.isEmpty { self.setDiag("groups=[] raw=\(raw.prefix(120))") }
-                    else { 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, raw in
-                guard let self else { return }
-                var urltest: [(tag: String, delayMs: Int)] = []
-                if let dict = obj as? [String: Any] {
-                    for (tag, v) in dict {
-                        if let d = (v as? NSNumber)?.intValue {
-                            urltest.append((tag: tag, delayMs: d))                    // 扁平 {tag:ms}
-                        } else if let inner = v as? [String: Any],
-                                  let d = (inner["delay"] as? NSNumber)?.intValue {
-                            urltest.append((tag: tag, delayMs: d))                    // 嵌套 {tag:{delay:ms}}
-                        }
-                    }
-                }
-                NSLog("[pangolin/collector] kernel delay(%@) n=%d raw=%@", name, urltest.count, raw)
-                self.queue.async {
+        // 主源:读 /proxies 里各 URLTest 成员的 history 缓存延迟(稳定,active 探测超时也不丢)。
+        // 同时对 URLTest 组主动跑一次 /group/<name>/delay 刷新 history(跳过 GLOBAL 选择器组)。
+        clashGet("/proxies", query: nil) { [weak self] obj, _ in
+            guard let self else { return }
+            let results = StatsCollector.extractUrltestResults(obj)
+            let groups = StatsCollector.extractUrltestGroups(obj).filter { $0 != "GLOBAL" }
+            self.queue.async {
+                if !results.isEmpty {
                     self.lock.lock()
-                    if !urltest.isEmpty {
-                        self.latestUrltest = urltest
-                        self.latest["urltestResults"] = urltest.map { ["tag": $0.tag, "delayMs": $0.delayMs] }
-                    }
-                    self.latest["diag"] = "d(\(name)) n=\(urltest.count) raw=\(raw.prefix(120))"
+                    self.latestUrltest = results
+                    self.latest["urltestResults"] = results.map { ["tag": $0.tag, "delayMs": $0.delayMs] }
                     self.lock.unlock()
                 }
+                self.setDiag("hist=\(results.map { "\($0.tag):\($0.delayMs)" }.joined(separator: ","))")
+                for name in groups {
+                    self.clashGet("/group/\(name)/delay",
+                                  query: ["url": "http://www.gstatic.com/generate_204",
+                                          "timeout": "5000"]) { _, _ in }
+                }
             }
         }
     }
@@ -529,6 +504,27 @@ final class StatsCollector: NSObject {
         }
         return names
     }
+
+    /// 从 /proxies 提取各 URLTest 组成员的最新 history 延迟(与 Windows extractUrltestResults 同法)。
+    static func extractUrltestResults(_ obj: Any?) -> [(tag: String, delayMs: Int)] {
+        guard let root = obj as? [String: Any],
+              let proxies = root["proxies"] as? [String: Any] else { return [] }
+        var results: [(tag: String, delayMs: Int)] = []
+        for (_, v) in proxies {
+            guard let group = v as? [String: Any],
+                  let type = group["type"] as? String, type == "URLTest",
+                  let members = group["all"] as? [Any] else { continue }
+            for m in members {
+                guard let tag = m as? String,
+                      let member = proxies[tag] as? [String: Any],
+                      let history = member["history"] as? [Any],
+                      let last = history.last as? [String: Any],
+                      let delay = (last["delay"] as? NSNumber)?.intValue, delay > 0 else { continue }
+                results.append((tag: tag, delayMs: delay))
+            }
+        }
+        return results
+    }
 }
 
 extension StatsCollector: LibboxCommandClientHandlerProtocol {
diff --git a/client/macos/Runner.xcodeproj/project.pbxproj b/client/macos/Runner.xcodeproj/project.pbxproj
index 1315f69..b084235 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 = "$(TEST_HOST)";
-				CURRENT_PROJECT_VERSION = 48;
+				CURRENT_PROJECT_VERSION = 49;
 				GENERATE_INFOPLIST_FILE = YES;
 				MARKETING_VERSION = 1.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.pangolin.pangolin.RunnerTests;
@@ -674,7 +674,7 @@
 			baseConfigurationReference = F8904897A48DC81799B8752E /* Pods-RunnerTests.release.xcconfig */;
 			buildSettings = {
 				BUNDLE_LOADER = "$(TEST_HOST)";
-				CURRENT_PROJECT_VERSION = 48;
+				CURRENT_PROJECT_VERSION = 49;
 				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 = 48;
+				CURRENT_PROJECT_VERSION = 49;
 				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 = 48;
+				CURRENT_PROJECT_VERSION = 49;
 				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 = 48;
+				CURRENT_PROJECT_VERSION = 49;
 				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 = 48;
+				CURRENT_PROJECT_VERSION = 49;
 				DEVELOPMENT_TEAM = BYL4KQHMTN;
 				ENABLE_APP_SANDBOX = YES;
 				ENABLE_HARDENED_RUNTIME = YES;