---
title: SCSICmdField8Byte
framework: IOKit
role: symbol
role_heading: Type Alias
platforms: [Mac Catalyst 13.0+, macOS 10.3+]
path: iokit/scsicmdfield8byte
---

# SCSICmdField8Byte

## Declaration

```occ
typedef UInt64 SCSICmdField8Byte;
```