diff --git a/src/api/nw_window_api.cc b/src/api/nw_window_api.cc
index be0e82c77d..dfa377cca8 100644
--- a/src/api/nw_window_api.cc
+++ b/src/api/nw_window_api.cc
@@ -891,6 +891,15 @@ NwCurrentWindowInternalToggleKioskModeInternalFunction::Run() {
   return RespondNow(NoArguments());
 }
 
+bool NwCurrentWindowInternalIsAACActiveInternalFunction::RunNWSync(base::ListValue* response, std::string* error) {
+#if defined(OS_MAC)
+  response->AppendBoolean((NWGetAACActive()));
+#else
+  response->AppendBoolean(false);
+#endif
+  return true;
+}
+
 bool NwCurrentWindowInternalIsKioskInternalFunction::RunNWSync(base::ListValue* response, std::string* error) {
   if (base::FeatureList::IsEnabled(::features::kNWNewWin)) {
     int id = 0;
diff --git a/src/api/nw_window_api.h b/src/api/nw_window_api.h
index e24359e7b3..d060fdae70 100644
--- a/src/api/nw_window_api.h
+++ b/src/api/nw_window_api.h
@@ -259,6 +259,16 @@ class NwCurrentWindowInternalToggleKioskModeInternalFunction : public ExtensionF
    DECLARE_EXTENSION_FUNCTION("nw.currentWindowInternal.toggleKioskModeInternal", UNKNOWN)
 };
 
+class NwCurrentWindowInternalIsAACActiveInternalFunction : public NWSyncExtensionFunction {
+ public:
+  NwCurrentWindowInternalIsAACActiveInternalFunction() {}
+  bool RunNWSync(base::ListValue* response, std::string* error) override;
+
+ protected:
+  ~NwCurrentWindowInternalIsAACActiveInternalFunction() override {}
+  DECLARE_EXTENSION_FUNCTION("nw.currentWindowInternal.isAACActiveInternal", UNKNOWN)
+};
+
 class NwCurrentWindowInternalIsKioskInternalFunction : public NWSyncExtensionFunction {
  public:
   NwCurrentWindowInternalIsKioskInternalFunction() {}
diff --git a/src/nw_content_mac.h b/src/nw_content_mac.h
index 8d49bd6135..ed3d019a30 100644
--- a/src/nw_content_mac.h
+++ b/src/nw_content_mac.h
@@ -17,4 +17,5 @@ void NWSetNSWindowShowInTaskbar(extensions::NativeAppWindow* win, bool show);
 void NWSetNSWindowShowInTaskbar(gfx::NativeWindow win, bool show);
 void NWSetNSAppKioskOptions(void);
 void NWRestoreNSAppKioskOptions(void);
+bool NWGetAACActive(void);
 #endif
diff --git a/src/nw_content_mac.mm b/src/nw_content_mac.mm
index 49a900ee11..28d2ed2e23 100644
--- a/src/nw_content_mac.mm
+++ b/src/nw_content_mac.mm
@@ -175,3 +175,10 @@ void NWRestoreNSAppKioskOptions(void) {
         }
     }
 }
+
+bool NWGetAACActive(void) {
+    if (@available(macOS 10.15.4, *)) {
+        return [session isActive];
+    }
+    return false;
+}
diff --git a/src/resources/api_nw_window.js b/src/resources/api_nw_window.js
index 7e50dadc26..8abc5a4265 100644
--- a/src/resources/api_nw_window.js
+++ b/src/resources/api_nw_window.js
@@ -588,6 +588,11 @@ apiBridge.registerCustomHook(function(bindingsAPI) {
         return this.appWindow.alphaEnabled();
       }
     });
+    Object.defineProperty(NWWindow.prototype, 'isAACActive', {
+      get: function() {
+        return currentNWWindowInternal.isAACActiveInternal();
+      }
+    });
     Object.defineProperty(NWWindow.prototype, 'isKioskMode', {
       get: function() {
         return currentNWWindowInternal.isKioskInternal();