---
title: kCTErrorDomainMach
framework: Core Telephony
role: symbol
role_heading: Global Variable
platforms: [iOS 4.0+, iPadOS 4.0+, Mac Catalyst 14.0+, macOS 10.10+]
path: coretelephony/kcterrordomainmach
---

# kCTErrorDomainMach

The domain value for errors reported by Mach.

## Declaration

```swift
var kCTErrorDomainMach: Int { get }
```

## Discussion

Discussion Mach error codes are listed in mach/error.h.

## See Also

### Error Domains

- [kCTErrorDomainNoError](coretelephony/kcterrordomainnoerror.md)
- [kCTErrorDomainPOSIX](coretelephony/kcterrordomainposix.md)