---
title: kHIDUsage_Keyboard4
framework: Kernel
role: symbol
role_heading: Enumeration Case
platforms: [macOS 10.12+]
path: kernel/1641313-anonymous/khidusage_keyboard4
---

# kHIDUsage_Keyboard4

## Declaration

```occ
kHIDUsage_Keyboard4 = 0x21
```