---
title: kIOFBNotifyDidChangeSpeed
framework: Kernel
role: symbol
role_heading: Enumeration Case
platforms: [macOS 10.12+]
path: kernel/1638125-anonymous/kiofbnotifydidchangespeed
---

# kIOFBNotifyDidChangeSpeed

## Declaration

```occ
kIOFBNotifyDidChangeSpeed = 10
```