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# OSSystemExtensionError.Code

Error codes for system extensions.

```
enum Code
```

## Topics

### Error Codes

[`OSSystemExtensionError.Code.unknown`](/documentation/SystemExtensions/OSSystemExtensionError/Code/unknown)

An error code that indicates an unknown error occurred.

[`OSSystemExtensionError.Code.missingEntitlement`](/documentation/SystemExtensions/OSSystemExtensionError/Code/missingEntitlement)

An error code that indicates the system extension lacks a required entitlement.

[`OSSystemExtensionError.Code.unsupportedParentBundleLocation`](/documentation/SystemExtensions/OSSystemExtensionError/Code/unsupportedParentBundleLocation)

An error code that indicates the extension’s parent app isn’t in a valid location for activation.

[`OSSystemExtensionError.Code.extensionNotFound`](/documentation/SystemExtensions/OSSystemExtensionError/Code/extensionNotFound)

An error code that indicates the manager can’t find the system extension.

[`OSSystemExtensionError.Code.extensionMissingIdentifier`](/documentation/SystemExtensions/OSSystemExtensionError/Code/extensionMissingIdentifier)

An error code that indicates the extension identifier is missing.

[`OSSystemExtensionError.Code.duplicateExtensionIdentifer`](/documentation/SystemExtensions/OSSystemExtensionError/Code/duplicateExtensionIdentifer)

An error code that indicates the extension identifier duplicates an existing identifier.

[`OSSystemExtensionError.Code.unknownExtensionCategory`](/documentation/SystemExtensions/OSSystemExtensionError/Code/unknownExtensionCategory)

An error code that indicates the extension manager can’t recognize the extension’s category identifier.

[`OSSystemExtensionError.Code.codeSignatureInvalid`](/documentation/SystemExtensions/OSSystemExtensionError/Code/codeSignatureInvalid)

An error code that indicates the extension’s signature is invalid.

[`OSSystemExtensionError.Code.validationFailed`](/documentation/SystemExtensions/OSSystemExtensionError/Code/validationFailed)

An error code that indicates the manager can’t validate the extension.

[`OSSystemExtensionError.Code.forbiddenBySystemPolicy`](/documentation/SystemExtensions/OSSystemExtensionError/Code/forbiddenBySystemPolicy)

An error code that indicates the system policy prohibits activating the system extension.

[`OSSystemExtensionError.Code.requestCanceled`](/documentation/SystemExtensions/OSSystemExtensionError/Code/requestCanceled)

An error code that indicates the system extension manager request was canceled.

[`OSSystemExtensionError.Code.requestSuperseded`](/documentation/SystemExtensions/OSSystemExtensionError/Code/requestSuperseded)

An error code that indicates the system extension request failed because the system already has a pending request for the same identifier.

[`OSSystemExtensionError.Code.authorizationRequired`](/documentation/SystemExtensions/OSSystemExtensionError/Code/authorizationRequired)

An error code that indicates the system was unable to obtain the proper authorization.


---

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