diff --git a/Packages/vChewing_MainAssembly/Sources/MainAssembly/AppDelegate.swift b/Packages/vChewing_MainAssembly/Sources/MainAssembly/AppDelegate.swift
index 6955b9b5..dda57dc6 100644
--- a/Packages/vChewing_MainAssembly/Sources/MainAssembly/AppDelegate.swift
+++ b/Packages/vChewing_MainAssembly/Sources/MainAssembly/AppDelegate.swift
@@ -134,10 +134,7 @@ public extension AppDelegate {
     NSApp.popup()
     guard result == NSApplication.ModalResponse.alertFirstButtonReturn else { return }
     let url = URL(fileURLWithPath: LMMgr.dataFolderPath(isDefaultFolder: true))
-    guard let finderURL = NSWorkspace.shared.urlForApplication(withBundleIdentifier: "com.apple.finder") else { return }
-    let configuration = NSWorkspace.OpenConfiguration()
-    configuration.promptsUserIfNeeded = true
-    NSWorkspace.shared.open([url], withApplicationAt: finderURL, configuration: configuration)
+    FileOpenMethod.finder.open(url: url)
     Uninstaller.uninstall(
       isSudo: false, selfKill: true, defaultDataFolderPath: LMMgr.dataFolderPath(isDefaultFolder: true)
     )
diff --git a/Packages/vChewing_MainAssembly/Sources/MainAssembly/LMMgr_PhraseEditorDelegate.swift b/Packages/vChewing_MainAssembly/Sources/MainAssembly/LMMgr_PhraseEditorDelegate.swift
index 50ae9bdf..098dddb3 100644
--- a/Packages/vChewing_MainAssembly/Sources/MainAssembly/LMMgr_PhraseEditorDelegate.swift
+++ b/Packages/vChewing_MainAssembly/Sources/MainAssembly/LMMgr_PhraseEditorDelegate.swift
@@ -17,8 +17,8 @@ import Shared
 extension LMMgr: PhraseEditorDelegate {
   public var currentInputMode: Shared.InputMode { IMEApp.currentInputMode }
 
-  public func openPhraseFile(mode: Shared.InputMode, type: vChewingLM.ReplacableUserDataType, appIdentifier: String) {
-    Self.openPhraseFile(fromURL: Self.userDictDataURL(mode: mode, type: type), appIdentifier: appIdentifier)
+  public func openPhraseFile(mode: Shared.InputMode, type: vChewingLM.ReplacableUserDataType, using app: FileOpenMethod) {
+    Self.openPhraseFile(fromURL: Self.userDictDataURL(mode: mode, type: type), using: app)
   }
 
   public func consolidate(text strProcessed: inout String, pragma shouldCheckPragma: Bool) {
diff --git a/Packages/vChewing_MainAssembly/Sources/MainAssembly/LMMgr_Utilities.swift b/Packages/vChewing_MainAssembly/Sources/MainAssembly/LMMgr_Utilities.swift
index 2084f409..4c690f34 100644
--- a/Packages/vChewing_MainAssembly/Sources/MainAssembly/LMMgr_Utilities.swift
+++ b/Packages/vChewing_MainAssembly/Sources/MainAssembly/LMMgr_Utilities.swift
@@ -273,30 +273,20 @@ public extension LMMgr {
   }
 
   static func openUserDictFile(type: vChewingLM.ReplacableUserDataType, dual: Bool = false, alt: Bool) {
-    let appIdentifier: String = alt ? "com.apple.TextEdit" : "com.apple.finder"
-    openPhraseFile(fromURL: userDictDataURL(mode: IMEApp.currentInputMode, type: type), appIdentifier: appIdentifier)
+    let app: FileOpenMethod = alt ? .textEdit : .finder
+    openPhraseFile(fromURL: userDictDataURL(mode: IMEApp.currentInputMode, type: type), using: app)
     guard dual else { return }
-    openPhraseFile(fromURL: userDictDataURL(mode: IMEApp.currentInputMode.reversed, type: type), appIdentifier: appIdentifier)
+    openPhraseFile(fromURL: userDictDataURL(mode: IMEApp.currentInputMode.reversed, type: type), using: app)
   }
 
   /// 用指定應用開啟指定檔案。
-  /// - Remark: 如果你的 App 有 Sandbox 處理過的話，請勿給 app 傳入 "vim" 參數，因為 Sandbox 會阻止之。
   /// - Parameters:
   ///   - url: 檔案 URL。
-  ///   - appIdentifier: 指定 App 應用的 bundle identifier 名稱。
-  static func openPhraseFile(fromURL url: URL, appIdentifier: String = "") {
+  ///   - FileOpenMethod: 指定 App 應用。
+  static func openPhraseFile(fromURL url: URL, using app: FileOpenMethod) {
     if !Self.checkIfUserFilesExistBeforeOpening() { return }
     DispatchQueue.main.async {
-      switch appIdentifier {
-      case "Finder", "com.apple.finder":
-        NSWorkspace.shared.activateFileViewerSelecting([url])
-      default:
-        guard let textEditURL = NSWorkspace.shared.urlForApplication(withBundleIdentifier: "com.apple.TextEdit") else { return }
-        let toolURL = NSWorkspace.shared.urlForApplication(withBundleIdentifier: appIdentifier) ?? textEditURL
-        let configuration = NSWorkspace.OpenConfiguration()
-        configuration.promptsUserIfNeeded = true
-        NSWorkspace.shared.open([url], withApplicationAt: toolURL, configuration: configuration)
-      }
+      app.open(url: url)
     }
   }
 
diff --git a/Packages/vChewing_PhraseEditorUI/Sources/PhraseEditorUI/PhraseEditorDelegate.swift b/Packages/vChewing_PhraseEditorUI/Sources/PhraseEditorUI/PhraseEditorDelegate.swift
index 30a9585f..67a578f0 100644
--- a/Packages/vChewing_PhraseEditorUI/Sources/PhraseEditorUI/PhraseEditorDelegate.swift
+++ b/Packages/vChewing_PhraseEditorUI/Sources/PhraseEditorUI/PhraseEditorDelegate.swift
@@ -17,6 +17,6 @@ public protocol PhraseEditorDelegate {
     -> String
   func checkIfPhrasePairExists(userPhrase: String, mode: Shared.InputMode, key unigramKey: String) -> Bool
   func consolidate(text strProcessed: inout String, pragma shouldCheckPragma: Bool)
-  func openPhraseFile(mode: Shared.InputMode, type: vChewingLM.ReplacableUserDataType, appIdentifier: String)
+  func openPhraseFile(mode: Shared.InputMode, type: vChewingLM.ReplacableUserDataType, using: FileOpenMethod)
   func tagOverrides(in strProcessed: inout String, mode: Shared.InputMode)
 }
diff --git a/Packages/vChewing_PhraseEditorUI/Sources/PhraseEditorUI/PhraseEditorUI.swift b/Packages/vChewing_PhraseEditorUI/Sources/PhraseEditorUI/PhraseEditorUI.swift
index bbe256f1..8111848d 100644
--- a/Packages/vChewing_PhraseEditorUI/Sources/PhraseEditorUI/PhraseEditorUI.swift
+++ b/Packages/vChewing_PhraseEditorUI/Sources/PhraseEditorUI/PhraseEditorUI.swift
@@ -186,8 +186,8 @@ public struct VwrPhraseEditorUI: View {
   }
 
   private func callExternalAppToOpenPhraseFile() {
-    let app: String = NSEvent.keyModifierFlags.contains(.option) ? "com.apple.TextEdit" : "com.apple.finder"
-    delegate?.openPhraseFile(mode: selInputMode, type: selUserDataType, appIdentifier: app)
+    let app: FileOpenMethod = NSEvent.keyModifierFlags.contains(.option) ? .textEdit : .finder
+    delegate?.openPhraseFile(mode: selInputMode, type: selUserDataType, using: app)
   }
 
   // MARK: - Main View.
diff --git a/Packages/vChewing_Shared/Sources/Shared/Shared.swift b/Packages/vChewing_Shared/Sources/Shared/Shared.swift
index 9cf07e67..866a01fa 100644
--- a/Packages/vChewing_Shared/Sources/Shared/Shared.swift
+++ b/Packages/vChewing_Shared/Sources/Shared/Shared.swift
@@ -6,6 +6,7 @@
 // marks, or product names of Contributor, except as required to fulfill notice
 // requirements defined in MIT License.
 
+import AppKit
 import Foundation
 import SwiftExtension
 
@@ -257,3 +258,44 @@ public class FileObserveProject: ObservableObject, Equatable {
     id = UUID().uuidString
   }
 }
+
+// MARK: - File Open Method
+
+public enum FileOpenMethod: String {
+  case finder = "Finder"
+  case textEdit = "TextEdit"
+  case safari = "Safari"
+
+  public var appName: String {
+    switch self {
+    case .finder: return "Finder"
+    case .textEdit: return "TextEdit"
+    case .safari: return "Safari"
+    }
+  }
+
+  public var bundleIdentifier: String {
+    switch self {
+    case .finder: return "com.apple.finder"
+    case .textEdit: return "com.apple.TextEdit"
+    case .safari: return "com.apple.Safari"
+    }
+  }
+
+  public func open(url: URL) {
+    switch self {
+    case .finder: NSWorkspace.shared.activateFileViewerSelecting([url])
+    default:
+      if #unavailable(macOS 10.15) {
+        NSWorkspace.shared.openFile(url.path, withApplication: appName)
+        return
+      } else {
+        let textEditURL = NSWorkspace.shared.urlForApplication(withBundleIdentifier: bundleIdentifier)
+        guard let textEditURL = textEditURL else { return }
+        let configuration = NSWorkspace.OpenConfiguration()
+        configuration.promptsUserIfNeeded = true
+        NSWorkspace.shared.open([url], withApplicationAt: textEditURL, configuration: configuration)
+      }
+    }
+  }
+}
diff --git a/Source/Modules/WindowControllers/CtlPrefWindow_PhraseEditor.swift b/Source/Modules/WindowControllers/CtlPrefWindow_PhraseEditor.swift
index 54e08798..1d6f54c9 100644
--- a/Source/Modules/WindowControllers/CtlPrefWindow_PhraseEditor.swift
+++ b/Source/Modules/WindowControllers/CtlPrefWindow_PhraseEditor.swift
@@ -197,8 +197,8 @@ extension CtlPrefWindow: NSTextViewDelegate, NSTextFieldDelegate {
   @IBAction func openExternallyPEButtonClicked(_: NSButton) {
     DispatchQueue.main.async { [weak self] in
       guard let self = self else { return }
-      let app: String = NSEvent.keyModifierFlags.contains(.option) ? "com.apple.TextEdit" : "com.apple.finder"
-      LMMgr.shared.openPhraseFile(mode: self.selInputMode, type: self.selUserDataType, appIdentifier: app)
+      let app: FileOpenMethod = NSEvent.keyModifierFlags.contains(.option) ? .textEdit : .finder
+      LMMgr.shared.openPhraseFile(mode: self.selInputMode, type: self.selUserDataType, using: app)
     }
   }