# init(version:item:keychain:pid:) Creates a new keychain callback information structure. ``` init(version: UInt32, item: Unmanaged, keychain: Unmanaged, pid: pid_t) ``` --- Copyright © 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)