diff --git a/Easydict/Swift/Utility/GetSelectedText/AXSwift+Extension.swift b/Easydict/Swift/Utility/GetSelectedText/AXSwift+Extension.swift
index a49dc607f..68148d8e3 100644
--- a/Easydict/Swift/Utility/GetSelectedText/AXSwift+Extension.swift
+++ b/Easydict/Swift/Utility/GetSelectedText/AXSwift+Extension.swift
@@ -45,14 +45,14 @@ extension UIElement {
         // Try to get the 4th menu item, which usually is the Edit menu.
         if menuChildren.count >= 4 {
             let editMenu = menuChildren[3]
-            logInfo("Checking Edit menu (4th menu item)")
+            logInfo("Checking the Edit(4th) menu")
             if let copyElement = findCopyMenuItemIn(editMenu) {
                 return copyElement
             }
         }
 
         // If not found in Edit menu, search the entire menu.
-        logInfo("Copy not found in Edit menu, searching entire menu")
+        logInfo("Copy not found in Edit(4th) menu, searching entire menu")
         return findCopyMenuItemIn(menu)
     }
 
diff --git a/Easydict/Swift/Utility/GetSelectedText/SystemUtility+GetSelectedText.swift b/Easydict/Swift/Utility/GetSelectedText/SystemUtility+GetSelectedText.swift
index 5387d4df6..d9d54e97b 100644
--- a/Easydict/Swift/Utility/GetSelectedText/SystemUtility+GetSelectedText.swift
+++ b/Easydict/Swift/Utility/GetSelectedText/SystemUtility+GetSelectedText.swift
@@ -105,30 +105,20 @@ extension SystemUtility {
 
         pasteboard.onPrivateMode {
             do {
-                try copyItem.performAction(.press)
                 logInfo("Performed action copy")
+                try copyItem.performAction(.press)
             } catch {
                 logError("Failed to perform action copy: \(error)")
             }
 
-            let semaphore = DispatchSemaphore(value: 0)
-
-            DispatchQueue.global().async {
-                pollTask(every: 0.005, timeout: 0.1) {
-                    if hasPasteboardChanged(initialCount: initialChangeCount) {
-                        result = getPasteboardString()
-                        semaphore.signal()
-                        return true
-                    }
-                    return false
-                } timeoutCallback: {
-                    logInfo("pollTask timeout call back")
-                    semaphore.signal()
+            pollTask {
+                if hasPasteboardChanged(initialCount: initialChangeCount) {
+                    result = getPasteboardString()
+                    return true
                 }
+                return false
             }
 
-            semaphore.wait()
-
             logInfo("Menu bar action copy getSelectedText: \(result ?? "nil")")
         }
 
@@ -146,21 +136,13 @@ extension SystemUtility {
         pasteboard.onPrivateMode {
             callSystemCopy()
 
-            let semaphore = DispatchSemaphore(value: 0)
-            DispatchQueue.global().async {
-                pollTask(every: 0.005, timeout: 0.1) {
-                    if hasPasteboardChanged(initialCount: initialChangeCount) {
-                        result = getPasteboardString()
-                        semaphore.signal()
-                        return true
-                    }
-                    return false
-                } timeoutCallback: {
-                    print("timeout")
-                    semaphore.signal()
+            pollTask {
+                if hasPasteboardChanged(initialCount: initialChangeCount) {
+                    result = getPasteboardString()
+                    return true
                 }
+                return false
             }
-            semaphore.wait()
         }
 
         logInfo("Shortcut copy getSelectedText: \(result ?? "nil")")
diff --git a/Easydict/Swift/Utility/GetSelectedText/SystemUtility.swift b/Easydict/Swift/Utility/GetSelectedText/SystemUtility.swift
index 05b8e41d5..2e8db02a5 100644
--- a/Easydict/Swift/Utility/GetSelectedText/SystemUtility.swift
+++ b/Easydict/Swift/Utility/GetSelectedText/SystemUtility.swift
@@ -77,9 +77,34 @@ func copyToClipboard(_ text: String) {
     pasteboard.setString(text, forType: .string)
 }
 
+/// Sync poll task, if task is true, return true, else continue polling.
+///
+/// - Warning: ⚠️ This method will block the current thread, only use when necessary.
+/// - Returns: true if the task succeeded, false if it timed out.
+@discardableResult
 func pollTask(
-    every interval: TimeInterval,
-    timeout: TimeInterval = 2,
+    every interval: TimeInterval = 0.005,
+    timeout: TimeInterval = 0.1,
+    task: () -> Bool,
+    timeoutCallback: () -> () = {}
+)
+    -> Bool {
+    let startTime = Date()
+    while Date().timeIntervalSince(startTime) < timeout {
+        if task() {
+            return true
+        }
+        Thread.sleep(forTimeInterval: interval)
+    }
+    timeoutCallback()
+    logInfo("pollTask timeout call back")
+    return false
+}
+
+/// Async poll task, if task is true, call timeoutCallback.
+func asyncPollTask(
+    every interval: TimeInterval = 0.005,
+    timeout: TimeInterval = 0.1,
     task: @escaping () -> Bool,
     timeoutCallback: @escaping () -> () = {}
 ) {
@@ -92,12 +117,13 @@ func pollTask(
             if elapsedTime >= timeout {
                 timer.invalidate()
                 timeoutCallback()
+                logInfo("pollTask timeout call back")
             } else {
                 logInfo("Still polling...")
             }
         }
     }
-
+    // For non-main thread, run loop must be run.
     RunLoop.current.run()
 }