---
title: kUSBOptionBitOpenExclusivelyMask
framework: Kernel
role: symbol
role_heading: Enumeration Case
platforms: [macOS 10.12+]
path: kernel/1646355-anonymous/kusboptionbitopenexclusivelymask
---

# kUSBOptionBitOpenExclusivelyMask

## Declaration

```occ
kUSBOptionBitOpenExclusivelyMask = ( 1 << kUSBOptionBitOpenExclusivelyBit )
```