---
title: kIOUSBDescriptorSizeBOS
framework: IOKit
role: symbol
role_heading: Enumeration Case
platforms: [Mac Catalyst 13.0+, macOS 10.15+]
path: iokit/tiousbdescriptorsize/kiousbdescriptorsizebos
---

# kIOUSBDescriptorSizeBOS

## Declaration

```occ
kIOUSBDescriptorSizeBOS = 5
```