---
title: kFWSpeedUnknownMask
framework: IOKit
role: symbol
role_heading: Enumeration Case
platforms: [Mac Catalyst 13.0+, macOS 10.2+]
path: iokit/iofwspeed/kfwspeedunknownmask
---

# kFWSpeedUnknownMask

## Declaration

```occ
kFWSpeedUnknownMask = 0x80
```