---
title: lastTrackNumberInLastSessionMSB
framework: IOKit
role: symbol
role_heading: Instance Property
platforms: [Mac Catalyst 13.0+, macOS 10.1+]
path: iokit/cddiscinfo/1584260-lasttracknumberinlastsessionmsb
---

# lastTrackNumberInLastSessionMSB

## Declaration

```occ
UInt8 lastTrackNumberInLastSessionMSB;
```