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

# kUSBOptionBitOpenExclusivelyBit

## Declaration

```occ
kUSBOptionBitOpenExclusivelyBit = 17
```

## Discussion

Discussion Used in open()'ing the IOUSBDevice or IOUSBInterface by the corresponding user client. Only 1 user client can have exclusive access to those objects