---
title: mcontext_t
framework: Kernel
role: symbol
role_heading: Structure
platforms: [macOS 10.8+]
path: kernel/mcontext_t
---

# mcontext_t

## Declaration

```occ
typedef struct mcontext64 {
    ...
} mcontext_t;
```

## Topics

### Instance Properties

- [es](kernel/mcontext_t/1577809-es.md)
- [fs](kernel/mcontext_t/1577811-fs.md)
- [ns](kernel/mcontext_t/3609097-ns.md)
- [ss](kernel/mcontext_t/1577816-ss.md)