---
title: firstTrackNumberInLastSessionMSB
framework: Kernel
role: symbol
role_heading: Instance Property
platforms: [macOS 10.5+]
path: kernel/bddiscinfo/1580834-firsttracknumberinlastsessionmsb
---

# firstTrackNumberInLastSessionMSB

## Declaration

```occ
UInt8 firstTrackNumberInLastSessionMSB;
```