---
title: kIOFBNotifyEvent_ChangeSpeed
framework: Kernel
role: symbol
role_heading: Enumeration Case
platforms: [macOS 10.13+]
path: kernel/2880404-anonymous/kiofbnotifyevent_changespeed
---

# kIOFBNotifyEvent_ChangeSpeed

## Declaration

```occ
kIOFBNotifyEvent_ChangeSpeed = (1ULL << 3)
```