---
title: kIOOutputCommandMask
framework: Kernel
role: symbol
role_heading: Enumeration Case
platforms: [macOS 10.12+]
path: kernel/1646399-anonymous/kiooutputcommandmask
---

# kIOOutputCommandMask

## Declaration

```occ
kIOOutputCommandMask = 0xff00
```

## Discussion

Discussion Define the command field in the return code.