General: DevForums tags: Files and Storage, Finder Sync, File Provider, Disk Arbitration, APFS File System Programming Guide On File System Permissions DevForums post File Provider framework Finder Sync framework App Extension Programming Guide > App Extension Types > Finder Sync Disk Arbitration Programming Guide Mass Storage Device Driver Programming Guide Device File Access Guide for Storage Devices Apple File System Guide TN1150 HFS Plus Volume Format Extended Attributes and Zip Archives File system changes introduced in iOS 17 DevForums post Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = "eskimo" + "1" + "@" + "apple.com"

I am using a Mac Catalyst with SwiftUI for our document-based app with DocumentGroup. The issue is that when we create a new document or open an existing one, the opened view is completely blank. It is only blank/empty when the "Optimzie for Mac" is checked. If it is "Scaled t oMatch iPad", then it works well. Xcode 16.1 macOS 15.1 struct DocumentGroupTestApp: App { var body: some Scene { DocumentGroup(newDocument: WritingAppDocument()) { file in TestView() // it is empty when it gets opened. It does not work if the option "Optimize for Mac" is checked. If it is scale iPad, then it works. } } } struct TestView: View { var body: some View { Text("Hello, World!") } }

Hello, I'm seeing a strange error on another user's device where the SwiftUI file importer doesn't do anything at all. When selecting multiple files and hitting "open", the importer just freezes. Here's a video showing the problem: https://streamable.com/u5grgy I'm unable to replicate on my own device, so I'm not sure what could be going on. I have startAccessingSecurityScopedResource and stopAccessingSecurityResource everywhere I access a file from fileImporter as well.

Delete the Documents path of the app Will the files or folders in the documentDirectory path or applicationSupportDirectory path disappear or be deleted when the OS is updated? I know that sometimes all the files in the cachesDirectory path are deleted when the OS is updated or the device is rebooted. Sometimes, users of my app report that all the files in the documentDirectory path or applicationSupportDirectory path are deleted or disappear, or all the files are deleted and initialized. I thought that the files or folders in the documentDirectory path or applicationSupportDirectory path were not affected by the OS update, but am I wrong?

I’m developing a file provider extension for macOS; I’m working with xcode 16 and macOS Sequoia. I created an host application via xcode with a simple button “Add domain” that triggers the following code: let domain = NSFileProviderDomain(identifier: NSFileProviderDomainIdentifier(rawValue: "me.piranef.fileprovider"), displayName: "piranef") NSFileProviderManager.add(domain) { theError in NSLog(">>> ERROR: \(theError?.localizedDescription ?? "No error")") } Note: I provide the link to the whole project on GitHub below. Finally I added via xcode a file provider target: At this point everything should be ok to run a simple stub application that once running add a piranef file provider visible under any file manager window in finder. But the following error appears: No file provider was found with the identifier “me.piranef.MyFileProviderTester” My suspect is that despite the target has been created by xcode, some setup in some .plist or .entitlement file must be changed manually or some tricky key added to make the file provider extension visible to the hosting application. I tried to manually change some setup that appeared logical for me like: The product bundle identifier in the target -> build settings of the extension: App Groups in the .entitlements file of the extension that seems set to a placeholder file, set to the same value of the host application: An hint I got reading the readme file of the FruitBasket sample application (by Apple) is to embed without signing the extension into the main app: Done! It’s ok! To give all possible information I uploaded the whole project into my github profile at: https://github.com/fpiraneo/fileproviderstub/ Any hint is welcome; I already googled or searched in StackOverflow or even asked ChatGPT for help but with no results. Even other users are experiencing the same issue and posting on StackOverflow with no answers: "Error adding File Provider domain: No valid file provider found with identifier ‘MyApp.FinderExtensionHost’ on MacOS” on StackOverflow

On some systems we are running into situations where we have an existing domain, but it remains in a stuck state where the domain exists but when attempting to interact with the domain to establish an XPC connection we get: =Error Domain=NSFileProviderInternalErrorDomain Code=0 "No valid file provider found from URL file:///Users/User/Library/CloudStorage/ProviderName-ProviderName." UserInfo={NSLocalizedDescription=No valid file provider found from URL file:///Users/User/Library/CloudStorage/Provider-Provider. Nothing that I've been able to do on an affected user account allows our app's domain to be added without facing errors. If we switch to a different user profile the domain is added and we can establish an XPC connection without any issues. So far I have tried: Removing the domain via NSFileProviderManager.removeAllDomains() Navigating to the domain in locations with the app uninstalled and deleting via the prompt within the Finder window Removing the plugin using: pluginkit -r /Applications/AppName.app/Contents/PlugIns/ProviderName.appex Removing the group container folder for the app from ~/Library/Group Containers and the app's data from ~/Library/Application Support/FileProvider/ I recognize that there is a profile (https://developer.apple.com/bug-reporting/profiles-and-logs/?platform=macos&name=Icloud) for additional logging, but having an end user install this is cumbersome. While I have encountered similar behavior myself I observed unix exception error 17 using console streaming logs though I can't be sure my issue is identical to the customers until we try and repeat the results on their systems with console streaming. macOS 15 has, deliberately, removed some of the options available in fileproviderctl to remove domains. If a fileProvider domain is in a bad state, how are we supposed to remove it? Relying only on NSFileProviderManager calls isn't helpful if these calls fail.

Hi, so as I understand it is not possible to know what all possible sources of files are available on iOS using some api call (by sources I mean smb shares connected, iCloud, gdrive, etc), the only paths I can get are the app sandbox, app group container and the same on iCloud. I can get the list of mount points in macOS using getmntinfo(), app/group sandbox and apart from these whatever standard locations I have given access to to my sandboxed app. Are there other paths that I can get? I want to know how I can determine the volume given a user picks a file using a file picker. Say, they picked 10 files from gdrive and another 5 from local storage. If I encounter some errors on the files from gdrive I want to stop working on all 10 of them but to do that I need to be able to determine that that are on this particular volume. Is there a way to do this programmatically? Ex: gdrive on iOS : "/private/var/mobile/Containers/Shared/AppGroup/6208BBEE-24BF-4CC9-A9ED-846F987C0442/File Provider Storage/39822865/1P8WD1tWEaq81ZB_DodTTZhXm0p00QaF7/test.txt" on MacOS: "/Users/username/Library/CloudStorage/GoogleDrive-useremailid/My Drive"

Hi，Regarding FileProvider, I know it has a permission authorization pop-up to control whether to open the FileProvider extension in the application settings But when I first used it, the switch was turned off by default. I noticed that some applications can pop up an authorization pop-up to prompt the user to turn on this permission I would like to ask what API this authorization pop-up is displayed through I expect the authorization pop-up window to pop up as shown in the following picture Thanks

Hello, I would like to know why my FileProvider. apex application cannot run on a Mac OS 12.0 computer after I compiled it on Mac OS 4.5. I have changed the macOS Deployment Target and Minimum Deployment in the XCode configuration file to 11.0, but it still cannot run The error is as follows:  2024-09-23 10:10:24.264067+0800 0xab312 Error 0x0 83438 0 O+Connect: (libFileProviders Manager. dylib) [com. oplus. DeviceSpace: FileProviders Manager] Unable to add domain, error: Error Domain=NSFileProviders Error Domain Code=-2001 "The application is currently unavailable. UserInfo={NSLocalizedDescription=The application is currently unavailable.} I want to know what this error means and how to solve it

Hi Team, I am trying to explore ESF events specifically generated by cloudsync extensions built on File Provider framework. Brief: I have high-level understanding of how various cloud vendors have provided their extensions to sync data from cloud/remote storage to local filesystem (and vice-versa). e.g.iCloudDriveFileProvider (icloud), DFSFileProviderExtension (google drive). There are 2 ESF AUTH events for file provider I can see namely: ES_EVENT_TYPE_AUTH_FILE_PROVIDER_MATERIALIZE , ES_EVENT_TYPE_AUTH_FILE_PROVIDER_UPDATE. and respectively their NOTIFY events. Observation: Observed that these events are generally triggered by fileproviderd process during download scenario i.e. syncing files from cloud/remote storage to local file system. i.e. 'materialize' for new file creation and 'update' for updating existing file. Question/Problem: Is there a correct way to find which cloud provider has triggered this download event? i.e. weather it is iCloudDriveFileProvider or DFSFileProviderExtension (there is this instigator field in Materialize event struct, but could not find similar for Update event. Are there similar ESF events for upload scenario? (I have fair understanding of how file-to-upload is copied to temp location and then uploaded by respective extensions to remote storage, but then they work with original files clone created in their temp location, so the AUTH events generated by this extension will wont reveal the original file name even if I am able to get the Fileprovider name) To Summarize: Basically I am looking for ESF event that will be triggered during upload scenario that can also let me know original file name as well the cloudprovider extension process name. As of now 'fileproviderd' process name is obtained from filesystem ESF events like AUTH_OPEN etc.

Hello, If a user allows access to, for example, Removable Volumes (TCC permission) to the main app, does these permissions will be inherited by a bundled Finder Extension from the main app? More specific, I have an app that bundles a Finder Extension and both the main app and the bundled extension need access to Removable Volumes. Only the main app can request it, since the main app is the only that can prompt the user. If the user allows, will the bundled extension also receive the permissions? If not, is there any workaround? Regards.

Hello, I developed a file provider extension that can access files from multiple locations. With the new macOS Sequoia I cannot access files from volumes, here is the error from Console: Refusing TCCAccessRequest for service kTCCServiceSystemPolicyRemovableVolumes from extension Sub:{com.app.ext}Resp:{TCCDProcess: identifier=com.app.ext-Driver, pid=26706, auid=501, euid=501, binary_path.... Driver}, extension point disallows prompting I added "Privacy - Removable Volumes Usage Description" values for both the main app and extension Info.plist, I click Allow on the alert, but still I receive this error message. Any solution? Thank you.

Hi I am using PhotosPicker and SwiftData with iOS17.0. I released my own app using codes of two above. No problem came up right until I upgraded my iphone to iOS 18.0 17th of September 24. A single post pokes the similar problem. SwiftData and PhotosPikcer. He or She said it was about SwiftData Model Insert something. But, I was able to use other methods that use SwiftData, so insert Model setup isn't my problem. But when tapping a photo to get a photo from PhotosPicker makes the ui goes down, and navigate back. Weird. iIt doesnt crash but when I tap a photo, the debug message [ERROR] Could not create a bookmark: NSError: Cocoa 4097 "connection to service named com.apple.FileProvider" comes up and the view navigates back. The selecting a photo itself doesnt include any SwiftData related methods, it only does loadTransferable thing and shows the photo on the screen. I cannot understand it. it only happened when I upgraded to iOS 18.0. AND Then i debugged the prob with Xcode 16.0 nothing but the unexpected message appears and not many posts are up here or google. Can you help me? Things I tried: Check any use of the PhotosPickerItem anywhere else. -> No where. Use try await loadTransferable Changed the form of initiating PhotosPikcer View Debugging every line -> Nothing appeared. PhotosPicker(selection: $currentImage, matching: .images, photoLibrary: .shared()) { Text("") } .frame(height: 360) .photosPickerStyle(.inline) .photosPickerAccessoryVisibility(.hidden, edges: .bottom) .photosPickerDisabledCapabilities(.selectionActions) .onChange(of: currentImage) { _, newImage in // SomeLogic } .ignoresSafeArea(edges: .bottom) .transition(.move(edge: .bottom).combined(with: .opacity))

When users share a file with my app I am having trouble 5-10% of the time obtaining the file meta data, specifically creation and modified time and size. Using SwiftUI with the code below.. .onOpenURL { url in var fileSize: Int64 = 0 var creationTime: Date = Date(timeIntervalSince1970: 0) var modificationTime: Date = Date(timeIntervalSince1970: 0) do { let fileAttributes = try FileManager.default.attributesOfItem(atPath: url.path) fileSize = fileAttributes[FileAttributeKey.size] as? Int64 ?? 0 creationTime = fileAttributes[FileAttributeKey.creationDate] as? Date ?? Date(timeIntervalSince1970: 0) modificationTime = fileAttributes[FileAttributeKey.modificationDate] as? Date ?? Date(timeIntervalSince1970: 0) <SNIPPED CODE no other tries though and not involving above variables> } catch { // quite confident I am ending up here because variables after the above code aren’t being set and there are no other try blocks, // so FileManager.default.attributesOfItem(atPath: url.path) must be throwing…. } <SNIPPED CODE> To attempt to resolve this, I added in a 0.5 second wait cycle if creationTime == 0 and modificationTime == 0 , so if obtaining both metadata fails, wait 0.5 seconds and try again, try this a max of 3 times and then give up. I don’t know how often I am entering this code (didn’t instrument the app for it), but am still getting times when metadata comes back blank which means this code wasn’t successful after 3 tries. I assume the file would only become visible and sharable with my app after it has completed being written by the original app/process. Perhaps it hasn’t finalized yet? Is there a way to detect this so I can tell the user in my share screen to wait and try again? I am assuming that the file has finished writing though since when I read the data from the file contents, it’s good data and complete even when metadata failed. I will be instrumenting the above code in my next app version, just hoping to fix it right now since users are emailing saying my app is broken. Thanks!

How can I read a dataless file from within the same or another FileProvider extension? When I pass the visible URL to AVAsset from AVFoundation, it throws the following error: Error Domain=AVFoundationErrorDomain Code=-11800 "The operation could not be completed" UserInfo={NSUnderlyingError=0x15b01b1e0 {Error Domain=NSPOSIXErrorDomain Code=11 "Resource deadlock avoided"}, NSLocalizedFailureReason=An unknown error occurred (11), AVErrorFailedDependenciesKey=( "assetProperty_Tracks" ), NSURL=file:///Users/<<username>>/Library/CloudStorage/<<file-path>>, NSLocalizedDescription=The operation could not be completed} The code snippet works fine if executed as a separate Swift process. I'm using AVAsset with AVAssetExportSession to export a subset of the file being read. So I can't use NSFileProviderManager.requestDownloadForItem(withIdentifier:, requestedRange:) because I don't know the offset range required by the AVFoundation library.

I've implemented FileProvider. But Final Cut Pro does not work with FileProvider, as it gives an error about this location is not supported. is there a way we can make FileProvider work with Final Cut Pro?

Hi, I'm trying to use the FileProvider Diagnostics Profile for macOS to get more details while debugging my FileProviderExtension. But when installing it it says its already expired: Any chance of getting an updated one that's not expired?

When capturing materialized information from materializedItemsDidChange in NSFileProviderReplicatedExtension, the isDownloaded property of NSFileProviderItem is not set during the call to enumerate items (NSFileProviderEnumerationObserver:enumerateItems(for:startingAt:)). Both the IsDownloaded and isMostRecentVersionDownloaded properties are returning false, even though the item is fully materialized How to capture this information from file provider extension ? Any help would be greatly appreciated. Thanks!

Can we download a file directly into a connected external storage like a pendrive without downloading it into App Sandbox environment first and then copying the file to external storage, in case of larger files.

I've file provider implementation where, in some cases, we must force download items, so they get materialized in local cache. I've used requestdownloadforitem based on following documentation https://developer.apple.com/documentation/fileprovider/nsfileprovidermanager/requestdownloadforitem(withidentifier:requestedrange:) I'm calling this within Extension code, but this does not trigger the download. How can I force file provider to download a file? cheers,

I am developing a file provider extension on Mac. I noticed when attempting to delete an enumerated folder with didDeleteItems, passing only the top-level folder's ID is not enough to delete the item. It seems we need to pass all items underneath as well to this function for the folder to be removed. Is there a way around this? The way our application is designed makes it challenging to do this and we would prefer being able to remove the folder by utilizing the item ID only. If not, how could we obtain the particular items underneath that should be passed in to the function?