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# SecKeychainSetDomainDefault(_:_:)

Sets the default keychain for a specified preference domain.

```
func SecKeychainSetDomainDefault(_ domain: SecPreferencesDomain, _ keychain: SecKeychain?) -> OSStatus
```

## Parameters

`domain`

The preference domain for which you wish to set the default keychain. See [`SecPreferencesDomain`](/documentation/Security/SecPreferencesDomain) for possible domain values.

`keychain`

A reference to the keychain you wish to set as default in the specified preference domain.

## Return Value

A result code. See [Security Framework Result Codes](/documentation/Security/security-framework-result-codes).

## Discussion

A preference domain is a set of security-related preferences, such as the default keychain and the current keychain search list. Use this function if you want to set the default keychain for a specific preference domain. Use the [`SecKeychainSetDefault(_:)`](/documentation/Security/SecKeychainSetDefault(_:)) function if you want to set the default keychain for the current preference domain. See the [`SecKeychainSetPreferenceDomain(_:)`](/documentation/Security/SecKeychainSetPreferenceDomain(_:)) function for a discussion of current and default preference domains.

---

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