---
title: kUnicodeFallbackCustomFirst
framework: Core Services
role: symbol
role_heading: Enumeration Case
platforms: [Mac Catalyst 17.0+, macOS 10.0+]
path: coreservices/1433507-fallback_handler_selectors/kunicodefallbackcustomfirst
---

# kUnicodeFallbackCustomFirst

Use the custom fallback handler first, then the default one.

## Declaration

```occ
kUnicodeFallbackCustomFirst = 3
```