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

# kIOUSBDescriptorSizeHubMaximum

## Declaration

```occ
kIOUSBDescriptorSizeHubMaximum = 21
```