# CFBundleCopyExecutableArchitecturesForURL(_:) Returns an array of CFNumbers representing the architectures a given URL provides. ``` func CFBundleCopyExecutableArchitecturesForURL(_ url: CFURL!) -> CFArray! ``` ## Parameters `url` The URL to examine. ## Return Value For a directory URL, if the bundle’s executable exists and is a Mach-O file, returns an array of CFNumbers whose values are integers representing the architectures the URL provides. For a plain file URL representing an unbundled executable, returns the architectures it provides if it is a Mach-O file. Possible values are listed in [Architecture Types](/documentation/CoreFoundation/1537096-architecture-types). If there is no bundle executable or if the executable is not a Mach-O file, returns `NULL`. Ownership follows the [The Create Rule](https://developer.apple.com/library/archive/documentation/CoreFoundation/Conceptual/CFMemoryMgmt/Concepts/Ownership.html#//apple_ref/doc/uid/20001148-103029). ## Discussion For a directory URL, this is equivalent to calling [`CFBundleCopyExecutableArchitectures(_:)`](/documentation/CoreFoundation/CFBundleCopyExecutableArchitectures(_:)) on the corresponding bundle. --- 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)