diff --git a/docs/api/app.md b/docs/api/app.md
index 4142baf97d..05bb19fef2 100755
--- a/docs/api/app.md
+++ b/docs/api/app.md
@@ -1571,19 +1571,6 @@ This is the user agent that will be used when no user agent is set at the
 app has the same user agent.  Set to a custom value as early as possible
 in your app's initialization to ensure that your overridden value is used.
 
-### `app.runningUnderRosettaTranslation` _macOS_ _Readonly_ _Deprecated_
-
-A `boolean` which when `true` indicates that the app is currently running
-under the [Rosetta Translator Environment](https://en.wikipedia.org/wiki/Rosetta_(software)).
-
-You can use this property to prompt users to download the arm64 version of
-your application when they are running the x64 version under Rosetta
-incorrectly.
-
-**Deprecated:** This property is superceded by the `runningUnderARM64Translation`
-property which detects when the app is being translated to ARM64 in both macOS
-and Windows.
-
 ### `app.runningUnderARM64Translation` _Readonly_ _macOS_ _Windows_
 
 A `boolean` which when `true` indicates that the app is currently running under
diff --git a/docs/breaking-changes.md b/docs/breaking-changes.md
index 69492c43f2..92192ae54d 100644
--- a/docs/breaking-changes.md
+++ b/docs/breaking-changes.md
@@ -63,6 +63,18 @@ The `ipcRenderer.sendTo()` API has been removed. It should be replaced by settin
 
 The `senderId` and `senderIsMainFrame` properties of `IpcRendererEvent` have been removed as well.
 
+### Removed: `app.runningUnderRosettaTranslation`
+
+The `app.runningUnderRosettaTranslation` property has been removed.
+Use `app.runningUnderARM64Translation` instead.
+
+```js
+// Removed
+console.log(app.runningUnderRosettaTranslation)
+// Replace with
+console.log(app.runningUnderARM64Translation)
+```
+
 ## Planned Breaking API Changes (27.0)
 
 ### Removed: macOS 10.13 / 10.14 support
diff --git a/shell/browser/api/electron_api_app.cc b/shell/browser/api/electron_api_app.cc
index 51fe3cffd5..63debcde56 100644
--- a/shell/browser/api/electron_api_app.cc
+++ b/shell/browser/api/electron_api_app.cc
@@ -1767,8 +1767,6 @@ gin::ObjectTemplateBuilder App::GetObjectTemplateBuilder(v8::Isolate* isolate) {
 #endif
 #if BUILDFLAG(IS_MAC)
       .SetProperty("dock", &App::GetDockAPI)
-      .SetProperty("runningUnderRosettaTranslation",
-                   &App::IsRunningUnderRosettaTranslation)
 #endif
 #if BUILDFLAG(IS_MAC) || BUILDFLAG(IS_WIN)
       .SetProperty("runningUnderARM64Translation",
diff --git a/shell/browser/api/electron_api_app.h b/shell/browser/api/electron_api_app.h
index 570d62aa4b..3b4d15c189 100644
--- a/shell/browser/api/electron_api_app.h
+++ b/shell/browser/api/electron_api_app.h
@@ -229,7 +229,6 @@ class App : public ElectronBrowserClient::Delegate,
   bool MoveToApplicationsFolder(gin_helper::ErrorThrower, gin::Arguments* args);
   bool IsInApplicationsFolder();
   v8::Local<v8::Value> GetDockAPI(v8::Isolate* isolate);
-  bool IsRunningUnderRosettaTranslation() const;
   v8::Global<v8::Value> dock_;
 #endif
 
diff --git a/shell/browser/api/electron_api_app_mac.mm b/shell/browser/api/electron_api_app_mac.mm
index 4da52b61c5..9b244c8f1b 100644
--- a/shell/browser/api/electron_api_app_mac.mm
+++ b/shell/browser/api/electron_api_app_mac.mm
@@ -60,17 +60,6 @@ void App::SetActivationPolicy(gin_helper::ErrorThrower thrower,
   [NSApp setActivationPolicy:activation_policy];
 }
 
-bool App::IsRunningUnderRosettaTranslation() const {
-  node::Environment* env =
-      node::Environment::GetCurrent(JavascriptEnvironment::GetIsolate());
-
-  EmitWarning(env,
-              "The app.runningUnderRosettaTranslation API is deprecated, use "
-              "app.runningUnderARM64Translation instead.",
-              "electron");
-  return IsRunningUnderARM64Translation();
-}
-
 bool App::IsRunningUnderARM64Translation() const {
   int proc_translated = 0;
   size_t size = sizeof(proc_translated);
diff --git a/spec/ts-smoke/electron/main.ts b/spec/ts-smoke/electron/main.ts
index 11bc068af0..7e30c40f07 100644
--- a/spec/ts-smoke/electron/main.ts
+++ b/spec/ts-smoke/electron/main.ts
@@ -427,6 +427,9 @@ win2.once('ready-to-show', () => {
 app.relaunch({ args: process.argv.slice(1).concat(['--relaunch']) });
 app.exit(0);
 
+// @ts-expect-error Removed API
+console.log(app.runningUnderRosettaTranslation);
+
 // auto-updater
 // https://github.com/electron/electron/blob/main/docs/api/auto-updater.md