I'm trying to use some files within my application without transfering them to the app's file system, I've managed to do that and by using a bookmark (https://developer.apple.com/documentation/professional_video_applications/fcpxml_reference/asset/media-rep/bookmark/using_bookmark_data) I can access the same directory automatically on every new app laucnh. But if the external device gets disconnected and connected again, or the mobile device is restarted, I've noticed a change in the external device's URL and I also get an error retrieving the bookmark Error Domain=NSFileProviderErrorDomain Code=-2001 "No valid file provider found with identifier ‘com.apple.filesystems.UserFS.FileProvider’." UserInfo={NSLocalizedDescription=No valid file provider found with identifier ‘com.apple.filesystems.UserFS.FileProvider’., NSUnderlyingError=0x302a45a40 {Error Domain=NSFileProviderErrorDomain Code=-2013 "(null)"}} Is there a way that I can automatically regain access to the external device directory, or is using the UIDocumentPickerViewController the only way to access it again? Thanks!

Hello~I want to ask a storage issue I had recently. I found that my file writing will fail frequently if the iOS device enable iCloud Photos and the used storage is more than device storage. ex. iCloud Photos 707.8 GB used and choose to optimize iPhone Storage iOS Device UI shows that 185 GB is available (total 256 GB in device) What I need is to write a big file to upload later and I use FileHandle to generate it: ex. let fileWriter = try? FileHandle(forWritingTo: url) while !bufferIsAtEnd() { let data = readChunckFromBuffer() do{ try fileWriter.write(contentsOf: data) }catch{ return false } } fileWriter.close() The file needs about 40GB space to write, but I always get disk full error even though iOS UI shows me the device space is enough ( 185GB ) This issue disappeared if I turn off iCloud Photos. I think that the available 185 GB seems to be locked by iCloud storage optimization(The total device storage 256GB is smaller than 707GB used in iCloud Photos) and makes my file writing failed. I could not always turn off iCloud Photos since it is inconvenient but I do not know how to resolve the disk full issue when iCloud Photos enabled. Any suggestion will be very appreciated!

It seems that the first time I open my app after the phone is restarted, the app does not properly access UserDefaults. When my app is launched, I pull relevant user settings / preferences from UserDefaults. I recently noticed (after some users reached out about issues) that the first time the app is opened after a restart, the app appears as though all user settings / preferences have been erased. If the app is force quit and reopened, the user data seems to come back normally. If the user takes action in the app before force quitting, though, UserDefaults will be written to with these new, empty values (essentially erasing what used to be in UserDefaults). This makes it seem as though right after the phone is restarted, the app is unable to pull data from UserDefaults for some reason. Has anyone else seen this issue? It could also be due to the lifecycle of my app and how I access UserDefaults, so if others don't have this issue it would be great to hear how you handle this.

I am using NetFS's NetFSMountURLAsync api to mount SMB share in mac os app. I am able to mount the share however this share is not automatically appearing in Finder's sidebar. I tried using LSSharedFileListInsertItemURL to make the mount point available in Finder's side bar however facing crash on line, kLSSharedFileListItemBeforeFirst.takeRetainedValue() from below code snippet. let itemType: CFString = kLSSharedFileListFavoriteItems.takeRetainedValue() if let list: LSSharedFileList = LSSharedFileListCreate(nil, itemType, nil)?.takeRetainedValue() { let inPropertiesToSet: CFMutableDictionary = CFDictionaryCreateMutable(nil, 1, nil, nil) CFDictionaryAddValue(inPropertiesToSet, unsafeBitCast(kLSSharedFileListVolumesNetworkVisible, to: UnsafeRawPointer.self), unsafeBitCast(kCFBooleanTrue, to: UnsafeRawPointer.self)) let driveUrl = URL(fileURLWithPath: mountPoint) let shareUrl: CFURL = driveUrl as CFURL if let item: LSSharedFileListItem = LSSharedFileListInsertItemURL( list, kLSSharedFileListItemBeforeFirst.takeRetainedValue(), nil, iconRef, shareUrl, inPropertiesToSet, nil) { let itemRefId = LSSharedFileListItemGetID(item) let itemRefIdStr = "\(itemRefId)" userDefaults.set(itemRefIdStr, forKey: mountPoint) } } Anything wrong in above code? Also since this api is deprecated is there any alternative API to achieve this. The goal is to make the mount point available in Finder's sidebar so that user can easily access it.

I would like to get notified, when a specific file gets opened or closed by another application. I tried different things like DispatchSource, FSEvents and kqueue, but nothing worked. The only option so far is searching for all process ids, that accesses the file with proc_listpidspath (or with the command line tool lsof). Unfortunately I need to use a Timer for this. But checking i. e. every second will need a lot of CPU, so I'm curious, if there is a built in notification in macOS?

I use UserDefaults to store a variety of user data / preferences. Recently, I have started getting somewhat frequent complaints from users that their settings have been reset. There doesn't appear to be a rhyme or reason to the issue (some users have all of their data reset just once, while others are seeing that one of their settings resets very frequently). I haven't been able to pinpoint what the root cause is, but I figure that it must have something to do with UserDefaults (either all of it or only certain keys) somehow getting erased. As I figure out the root cause, I figure that a good solution in the meantime is to backup UserDefaults in some way (e.g. perhaps to iCloud?). Is there a standard / best-practice way of doing this?

I'm a bit confuse on the file permission between root and admin account. I'm developing the background user agent process, and I created the agent plist file with the permission R&W for my admin account. When I tried to load my agent process with launchd, it said the plist file permission is not right. Only after I change the plist file owner to root chown root my.plist, did everything work. From the above situation, it seems that the root user cannot access files that are only authorized to the admin user. Admin account also can't access files authorized only to root, unless you add sudo or enter the password when the request admin password box pops up. But by sudo or password, it just temporarily converts your account from admin to root account. So am I right in my speculation?

Hello, I am having some trouble with an application accessing and running SQlite database queries. The error I am getting is (5642) SQLITE_IOERR_SEEK when trying to sqlite_step_stement in the database. See https://www.sqlite.org/rescode.html#ioerr_seek A bit of background, it is an application in Unreal Engine, and everything was working fine in Unreal Engine 4. The application uses a SQlite database on disk to store and fetch data. This database is saved to the documents folder. (I also tried other folders to see if that would make a difference) But since switching to a new version of the engine, Unreal Engine 5, in a build I am getting errors when trying to read/write to the database. This only happens in a build .app file. The only big difference I can find is that in the new engine when making a build the codesigning is already done in the engine. I don't see why those settings would break anything though. It also has an entitlements file, but I also edited it and made sure it has the same entitlements settings as my own scripts that are run afterwards. I am overwriting the codesigning with our own CI/CD scripts afterwards. The .app file is codesigned, notarized and stapled by that script. Also I use an entitlements file to set certain values. It doesn't seem to be a code related issue, as everything is working fine when running the application "in editor". But only when creating a final .app build. It doesn't matter if this build is in Debug or Shipping. My first thought was to try more entitlements settings. But I tried the following and I am still getting the same errors: <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> <plist version="1.0"> <dict> <key>com.apple.security.cs.debugger</key> <true/> <key>com.apple.security.cs.disable-executable-page-protection</key> <true/> <key>com.apple.security.cs.disable-library-validation</key> <true/> <key>com.apple.security.automation.apple-events</key> <true/> <key>com.apple.security.app-sandbox</key> <false/> <key>com.apple.security.cs.allow-dyld-environment-variables</key> <true/> <key>com.apple.security.cs.allow-jit</key> <true/> <key>com.apple.security.cs.allow-unsigned-executable-memory</key> <true/> <key>com.apple.security.files.downloads.read-write</key> <true/> <key>com.apple.security.network.client</key> <true/> <key>com.apple.security.network.server</key> <true/> </dict> </plist> I also am thinking that it might be a different issue as the application is able to create a database file in the documents folder, just not able to do the read write inside the database. These values are just set to try if any of these settings "fix" the issue, but thus far no luck. As there is nothing I can find in Unreal Engine related forums, and I also do not have a lot of experience with all the options when making Mac builds. I was hoping someone on this forum could think of a reason why a .app file would have problems with reading and writing to a SQlite database.

Hello. I am trying to load my own Image Based Lighting file in a visionOS RealityView. I used the code you get when creating a new project from scratch and selecting the immersive space to full when creating the project. With the sample file Apple provides, it works. But when I put my image in PNG, HEIC or EXR format in the same location the example file was in, it doesn't load and the error states: Failed to find resource with name "SkyboxUpscaled2" in bundle In this image you can see the file "ImageBasedLight", which is the one that comes with the project and the file "SkyboxUpscaled2" which is my own in the .exr format. if let immersiveContentEntity = try? await Entity(named: "Immersive", in: realityKitContentBundle) { content.add(immersiveContentEntity) do{ let resource = try await EnvironmentResource(named: "SkyboxUpscaled2") let iblComponent = ImageBasedLightComponent(source: .single(resource), intensityExponent: 0.25) immersiveContentEntity.components.set(iblComponent) immersiveContentEntity.components.set(ImageBasedLightReceiverComponent(imageBasedLight: immersiveContentEntity)) }catch{ print(error.localizedDescription) } Does anyone have an idea why the file is not found? Thanks in advance!

I am uploading pdf document through document picker from One drive. When I am uploading pdf document from OneDrive personal account it is working fine but when I am uploading from OneDrive business account it is getting failed.

I have an app with IAP which uses a URLSession object to download files from a server. The download part of the code is: let request = URLRequest(url: fromURL, cachePolicy: .reloadIgnoringLocalCacheData, timeoutInterval: timeoutInterval) let (data, response) = try await downloadSession.data(for: request) This code has been working without trouble for over a year with thousands of downloads. Now I have a user with a new iPhone (iOS 17.3.1) which refuses to download, failing at the above code (judging by the high level logs). My question is this: What sort of things should we be looking at in order to diagnose this issue? So far we have done the following: He has no general download issue (eg Safari works fine) His network access is 'normal' and the problem persists when the network is changed (4G, wifi etc) He runs a VPN (Nord) but the problem persists when this is off He has no 3rd party AV software His phone is not in lockdown mode Any pointers would be appreciated! NB I have no physical access to his device (yet!)

Hi, I have an issue that I don't understand, and I need help. I am using Pipe() in Swift, and I found that if I create more than 2560 (more or less) pipes, I cannot create more. The call fails with Too many open files, even though I closed all the files associated with the pipes. This is a minimal code to reproduce the issue: for i in 0...1278 { NSLog("Testing: \(i)") let stdin_pipe = Pipe() let stdin_file = fdopen(stdin_pipe.fileHandleForReading.fileDescriptor, "r") var stdout_pipe = Pipe() var stdout_file = fdopen(stdout_pipe.fileHandleForWriting.fileDescriptor, "w") if (stdout_file == nil) { let errorString = String(cString: strerror(errno)) NSLog("Could not create an output stream. Error: \(errorString)") } do { // I'm really trying to close everything (but it doesn't matter): close(stdout_pipe.fileHandleForWriting.fileDescriptor) close(stdin_pipe.fileHandleForReading.fileDescriptor) try stdout_pipe.fileHandleForWriting.close() try stdin_pipe.fileHandleForReading.close() try stdout_pipe.fileHandleForReading.close() try stdin_pipe.fileHandleForWriting.close() } catch { NSLog("Error in closing pipes in MyExtension: \(error.localizedDescription)") } } It will work for i going to 0 to 1277, and fail for i == 1278. The error (obtained from strerror(errno) is Too many files open, even though there are around 6 file descriptors opened (I checked). What am I doing wrong?

I have a file named ä.txt (with German umlaut) on my FTP server. I select it like this: let openPanel = NSOpenPanel() openPanel.runModal() let source = openPanel.urls[0] Running this code unexpectedly throws an error: do { print(try source.checkResourceIsReachable()) } catch { print(error) // Error Domain=NSPOSIXErrorDomain Code=2 "No such file or directory” } Manipulating the URL also seems to change the underlying characters: print(source) // file:///Volumes/abc.com/httpdocs/%C3%A4.txt print(URL(fileURLWithPath: source.path)) // file:///Volumes/abc.com/httpdocs/a%CC%88.txt Note that both variants of the URL above also throw the same error when running URL.checkResourceIsReachable(). If I download the file to my Mac, then both variants print file:///Users/me/Downloads/a%CC%88.txt and neither of them throws an error when running URL.checkResourceIsReachable(). What is the problem? How can I correctly access this file on the FTP server?

Hello. I have the following question. I have a program that creates files with its own extension and reads them. When I select a file with my extension in the Files app, it automatically opens my app. But if a file with my extension is attached to an email, when I click on my file it shows me a screen with programs to open (actually it shows my program the second time I click on the file, if I click the first time, my program is not listed) . I have a question, is it possible to make the file with my extension attached to the letter immediately open in my program without additional screens or is it not allowed. If possible, then what did I miss, based on the fact that it opens immediately from the Files program. Thank you. P.S. File how it works below: ![] [Image Edited by Moderator to Remove Personal Information]

I'm finding a way to hook vnode operations, following is a snippet of the code: IOReturn FltIOKitKAuthVnodeGate::RegisterVnodeScopeCallback(void) { // // register our listener // this->VnodeListener = kauth_listen_scope( KAUTH_SCOPE_VNODE, // for the vnode scope FltIOKitKAuthVnodeGate::VnodeAuthorizeCallback, // using this callback this ); // give a cookie to callback if( NULL == this->VnodeListener ){ DBG_PRINT_ERROR( ( "kauth_listen_scope failed\n" ) ); return kIOReturnInternalError; } return kIOReturnSuccess; } Here use kauth_listen_scope to get the newly created vnode object, then will hook on it. But now kauth_listen_scope is deprecated, and there is no way to get the vnode by using EndpointSecurity. So is there any other way to get the newly created vnode object?

Questions about isExcludedFromBackup option and device migration I posted a similar question a year ago, but I still haven't found a solution that I like, so I'm leaving this question. If anyone knows how, please let me know. In our app, we set the isExcludedFromBackup option to true so that files currently in the Documents path are not backed up to iCloud. In the current situation, I am just curious as to whether the files of our app can be backed up in the two situations below. (with isExcludedFromBackup option set to true ) Migrate iPhone to new iPhone Backup and restore the entire device to iTunes If you set the isExcludedFromBackup option to true in the file, iCloud backup will not be possible, and the app's internal files will not be copied even in the two situations mentioned above. Is there an option or method in the app's internal code to prevent automatic backup only to iCloud and allow files to be copied or synchronized in the above two situations?

I am working on a similar application and would like to refer to the sample application referred in this video - "File Squeezer" and couldn't find anywhere. Could anybody please help me find this sample code?

Hi, so following other tutorials on sharing app files to user I added and enabled LSSupportsOpeningDocumentsInPlace and UIFileSharingEnabled in info.plist. On app launch I create a sample file in the Documents Directory so that it shows up on the "On my iPhone" storage. I check this with the simulators for iOS17, iOS16 and it works fine, but for iOS15 it does not display the folder for my app. Does anyone have an idea on how to fix this?

If I drag something into my SwiftUI Mac app the .dropDestination gets an array of URLs that I can do with what I want. If I use .fileImporter to get an identical array of URLs I should wrap start/stop securityScopedResource() calls around each URL before I do anything with it. Can anyone explain the logic behind that? Is there some reason I'm not seeing? It is especially annoying in that the requirement for security scoping also doesn't exist if I use an NSOpenPanel instead of .fileImporter.

I'm currently trying to develop a transparent data encryption(TDE) system on MacOS 12.6.8. Our company has its own file encryption format. In order to facilitate safe and convenient file transfer between Windows and Mac platforms, we need to develop a TDE system on the Mac platform (on the Windows platform, we have developed such a system based on the Minifilter framework). I tried to implement this system using a MacFuse based file system and the Endpoint Security system extension, but found that this did not allow complete control of files on the Mac system. For example, when you use Finder to copy an encrypted file, the decrypted data will be copied out. I'm guessing this might be due to Finder or some other system process cache. By referring to the current product introductions of other companies, I learned that the current TDE systems on Mac systems are all based on kernel extension. But I noticed that Apple no longer encourages kernel extension development, and the Mac kernel has fewer and fewer APIs open to development. So I would like to ask is it still feasible to develop a TDE system based on the kernel extension?