<!--
{
  "availability" : [
    "iOS: 4.0.0 -",
    "iPadOS: 4.0.0 -",
    "macCatalyst: 14.0.0 -",
    "macOS: 10.10.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "CoreTelephony",
  "identifier" : "/documentation/CoreTelephony/kCTErrorDomainMach",
  "metadataVersion" : "0.1.0",
  "role" : "Global Variable",
  "symbol" : {
    "kind" : "Global Variable",
    "modules" : [
      "Core Telephony"
    ],
    "preciseIdentifier" : "c:@Ea@kCTErrorDomainNoError@kCTErrorDomainMach"
  },
  "title" : "kCTErrorDomainMach"
}
-->

# kCTErrorDomainMach

The domain value for errors reported by Mach.

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

## Discussion

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

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)