# CFURLStopAccessingSecurityScopedResource(_:) In an app that adopts App Sandbox, revokes access to the resource pointed to by a security-scoped URL. ``` func CFURLStopAccessingSecurityScopedResource(_ url: CFURL!) ``` ## Parameters `url` The security-scoped URL that points to the file-system resource you want to stop accessing. ## Discussion When you no longer need access to a file or directory pointed to by a security-scoped URL, such as one returned by resolving a security-scoped bookmark, call this function (or its Cocoa equivalent, ) on the URL. > Warning: > You must balance every call to the ``doc://com.apple.corefoundation/documentation/CoreFoundation/CFURLStartAccessingSecurityScopedResource(_:)`` method with a corresponding call to the ``doc://com.apple.corefoundation/documentation/CoreFoundation/CFURLStopAccessingSecurityScopedResource(_:)`` method. If you fail to relinquish your access when you no longer need a file-system resource, your app leaks kernel resources. If sufficient kernel resources are leaked, your app loses its ability to add file-system locations to its sandbox, such as via Powerbox or security-scoped bookmarks, until relaunched. > Version note: > Security-scoped bookmarks are not available in versions of macOS prior to OS X v10.7.3. --- 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)