---
title: OSSystemExtensionError
framework: systemextensions
role: symbol
role_heading: Structure
path: systemextensions/ossystemextensionerror
---

# OSSystemExtensionError

An error that describes a failed extension manager request.

## Declaration

```swift
struct OSSystemExtensionError
```

## Topics

### Inspecting Error Properties

- [errorDomain](systemextensions/ossystemextensionerror/errordomain.md)

### Error Codes

- [OSSystemExtensionError.Code](systemextensions/ossystemextensionerror/code.md)
- [unknown](systemextensions/ossystemextensionerror/unknown.md)
- [missingEntitlement](systemextensions/ossystemextensionerror/missingentitlement.md)
- [unsupportedParentBundleLocation](systemextensions/ossystemextensionerror/unsupportedparentbundlelocation.md)
- [extensionNotFound](systemextensions/ossystemextensionerror/extensionnotfound.md)
- [extensionMissingIdentifier](systemextensions/ossystemextensionerror/extensionmissingidentifier.md)
- [duplicateExtensionIdentifer](systemextensions/ossystemextensionerror/duplicateextensionidentifer.md)
- [unknownExtensionCategory](systemextensions/ossystemextensionerror/unknownextensioncategory.md)
- [codeSignatureInvalid](systemextensions/ossystemextensionerror/codesignatureinvalid.md)
- [validationFailed](systemextensions/ossystemextensionerror/validationfailed.md)
- [forbiddenBySystemPolicy](systemextensions/ossystemextensionerror/forbiddenbysystempolicy.md)
- [requestCanceled](systemextensions/ossystemextensionerror/requestcanceled.md)
- [requestSuperseded](systemextensions/ossystemextensionerror/requestsuperseded.md)
- [authorizationRequired](systemextensions/ossystemextensionerror/authorizationrequired.md)

## Relationships

### Conforms To

- [CustomNSError](foundation/customnserror.md)
- [Equatable](swift/equatable.md)
- [Error](swift/error.md)
- [Hashable](swift/hashable.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)

## See Also

### Errors

- [OSSystemExtensionError.Code](systemextensions/ossystemextensionerror/code.md)
- [OSSystemExtensionErrorDomain](systemextensions/ossystemextensionerrordomain.md)