---
title: applicationAccessibilityEnabledDidChangeNotification
framework: Accessibility
role: symbol
role_heading: Type Property
platforms: [iOS 27.0+, iPadOS 27.0+, Mac Catalyst 27.0+, macOS 27.0+, tvOS 27.0+, visionOS 27.0+, watchOS 27.0+]
path: accessibility/accessibilitysettings/applicationaccessibilityenableddidchangenotification
---

# applicationAccessibilityEnabledDidChangeNotification

Posted when the value returned by AXApplicationAccessibilityEnabled() changes.

## Declaration

```swift
static let applicationAccessibilityEnabledDidChangeNotification: NSNotification.Name
```

## Discussion

Discussion Posted on the main thread. The notification’s object is nil and its userInfo dictionary is empty — clients should re-read AXApplicationAccessibilityEnabled() when handling the notification.