---
title: ATSNotificationCallback
framework: Application Services
role: symbol
role_heading: Type Alias
platforms: [Mac Catalyst 13.0+, macOS 10.2+]
path: applicationservices/atsnotificationcallback
---

# ATSNotificationCallback

## Declaration

```swift
typealias ATSNotificationCallback = (ATSFontNotificationInfoRef?, UnsafeMutableRawPointer?) -> Void
```