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

# kUnicodeFallbackCustomOnly

Use the custom fallback handler only.

## Declaration

```occ
kUnicodeFallbackCustomOnly = 1
```