---
title: IOUSBHostCIExceptionTypeUnknown
framework: Kernel
role: symbol
role_heading: Enumeration Case
platforms: [macOS 11.0+]
path: kernel/iousbhostciexceptiontype/iousbhostciexceptiontypeunknown
---

# IOUSBHostCIExceptionTypeUnknown

## Declaration

```occ
IOUSBHostCIExceptionTypeUnknown = 0
```