---
title: kIOUSBMessageExpressCardCantWake
framework: IOKit
role: symbol
role_heading: Macro
platforms: [Mac Catalyst 13.0+, macOS 10.4+]
path: iokit/kiousbmessageexpresscardcantwake
---

# kIOUSBMessageExpressCardCantWake

## Declaration

```occ
#define kIOUSBMessageExpressCardCantWake
```

## Discussion

Discussion Messages specific to the IOUSBFamily. Note that the iokit_usb_msg(x) translates to 0xe0004xxx, where xxx is the value in parenthesis as a hex number.