Hello, I have developed a custom filesystem in golang, that relies on macFUSE. High-level apps on osx (TextEdit, Numbers, Preview) rely on syscall.renamex_np with the flag RENAME_SWAP in order to save edits. In golang, the sys call renamex_np and renameat2 are not supported, thus I had to implement the logic for it it. The discussion opened on the google group for macFUSE can be followed here: https://groups.google.com/g/osxfuse-group/c/Kh0qVRGIVv4 On my mounted filesystem, edits work and performing system calls work. However after I perform a series of edits in TextEdit, and completely exit TextEdit. When I call open (1) on the file I get the following error: The application cannot be opened for an unexpected reason, error=Error Domain=NSOSStatusErrorDomain Code=-43 "fnfErr: File not found" UserInfo={_LSLine=4129, _LSFunction=_LSOpenStuffCallLocal} From the logs of my app, there is no open (2) called on the file. I have tried to (trace) dtruss the open call for Numbers/TextEdit, but when I perform the above scenario, my Mac system freezes and the piped output from dtruss is 0 bytes after rebooting my system. How can I debug my issue? Where can I find more documentation of the order of system calls for open (1)? I couldn't find the source code for renamex_np thus my implementation relied on the linux kernel implementation of renameat2, does renamex_np do something different? I note that, if I open TextEdit for example, and then open my file, there is no problem. Also calling cat for example on the terminal it displays the content correctly. The problem seems to be from open (1). Furthermore, if I perform a rename of the file, open (1) succeeds in opening the file, until I perform at least another edit from a high-level app (that calls rename with the swap flag). Also if I unmount my filesystem and mount it again, open (1) behaves correctly. How can I understand what open (1) is doing under the hood? For the high-level apps I could trace the system calls and figure out why they didn't work, but now I reached a point (scenario) where I can't trace the system calls for open (1) due to my whole system freezing. Any input is appreciated.

Hi, I submitted a Feedback Report (FB13820685) but I thought I would ask here as well because maybe I am using the framework wrong. I am using NSFilePresenter to monitor changes to a folder. On macOS, iOS (simulator), iOS (device), and watchOS (simulator) it works fine. However when running on watchOS 10.5 on device, it does not appear to work at all. I created a sample project that reproduces this problem. Am I doing something wrong? It seems like this is too basic of a problem for it to be actually broken on all Apple Watches. https://github.com/jeffreybergier/NSFilePresenterBugSampleProject

Hello, I’m seeking some clarity regarding the memory storage of application code and static libraries. I understand the basic memory layout in terms of the code (text) segment, data segment, heap, and stack: • Code Segment (Text Segment): Typically stores the compiled program code. • Data Segment: Stores global and static variables. • Heap: Dynamically allocated memory during runtime. • Stack: Stores local variables and function call information. However, I’ve come across some conflicting information: 1. Official Documentation: In an illustration from Apple’s official documentation, it appeared as though application code might be stored in the heap. This seemed unusual given my understanding that compiled code is generally stored in the code segment. from document archive 2. Blog Posts: Several blogs mention that the source code for static libraries is stored in the heap. This also contradicts my understanding since static libraries, after being linked, should be part of the application’s executable code, thus residing in the code segment. Given these points, my understanding is that: • Application Code: After compilation, the executable code should be stored in the code segment. • Static Libraries: Once linked, the code from static libraries should also be part of the code segment. Could you please clarify: • Where exactly is the application code stored in memory? • Is the claim that static libraries’ source code is stored in the heap correct, or is it a misunderstanding? Thank you!

I have an iPhone app, and added watch support, including a simple launcher complication. I can add the complication using the edit UI on the watch, but the complication is not visible using the watch app on the iPhone. When I add my complication on the watch and then open the watch app on the iPhone, the complication slot shows as "Off". What could I be doing wrong?

Hello, For educational purpose, I try to use a POSIX semaphore sem_t instead of a dispatch_semaphore_t in a sandbox macOS Obj-C app. When using sandbox, the semaphore code creation : sem_t * _unixSemaphore; char nameSemaphore[64] = {0}; snprintf(nameSemaphore, 22, "/UnixSemaphore_sample"); _unixSemaphore = sem_open(nameSemaphore, O_CREAT, 0644, 0); fails, receiving SEM_FAILED and the errno is 78 (not implemented) However, the sem_t _unixSemaphore is created and works fine when I disable sandbox I my entitlements. Is there a way to fix this? Thank you in advance Jean Marie

My company has developed a desktop-Mac FileProvider extension which presents a user with shared encrypted folders; it's working well except for one issue. While we can handle moving an encrypted folder, there seems to be no way to detect that an encrypted folder has been copied or duplicated. Is there any equivalent to the Windows shell extension copy-hook handler, which can allow NSReplicatedFileProviderExtension (or some other portion of the system) to detect that a folder is being copied?

2024-06-04 15:17:59.618853+0100 ProxyAgent[20233:29237510] [xpc.exceptions] <NSXPCConnection: 0x60000331cb40> connection from pid 20227 on anonymousListener or serviceListener: Exception caught during decoding of received selector newFlowWithIdentifier:to:type:metadata:socket:, dropping incoming message. Exception: Exception while decoding argument 4 (#6 of invocation): <NSInvocation: 0x600001778780> return value: {v} void target: {@} 0x0 selector: {:} null argument 2: {@} 0x6000017787c0 argument 3: {@} 0x60000002d170 argument 4: {q} 1 argument 5: {@} 0x600001746600 argument 6: {@} 0x0 Exception: decodeObjectForKey: Object of class "NSFileHandle" returned nil from -initWithCoder: while being decoded for key <no key> The extension is in Swift; the recipient is in ObjC (wheeeeee). Based on the extension's logging, the FileHandle is not nil. I am trying to pass a FileHandle based on a socketpair up to the user-land code. The sockets are created happily. Any ideas what's going wrong here?

By calling the deactivationRequest from the main app bundle, we see Privacy & Security prompts for TouchID to deactivate the System Extension. We want to know if there's way to avoid that prompt. And also need know why the prompt pops up to deactivate our own app's System Extension component. We even tried to call the deactivate request from Daemon which contain the root access. We still see the prompt. https://developer.apple.com/documentation/systemextensions/ossystemextensionrequest/deactivationrequest(forextensionwithidentifier:queue:)

Hello, I get a lot of crashlogs from MetricKit watchdog on iOS 17.5.1 all related to dyld. Does anybody has the same issue or any idea what could be the problem? Attached is the watchdog log. wathchdog exhausted real (wall clock) time allowance of 30.00 seconds ProcessVisibility: Background ProcessState: Running WatchdogEvent: process-launch. crash in dyld process Following error is shown: 0 Thread 0 1 dyld objc::findhash(dyld3::OverflowSafeArray<objc::bstuff, 4294967295ull>&, unsigned int*, unsigned long long*, unsigned int*, unsigned int, dyld3::OverflowSafeArray<objc::PerfectHash::key, 4294967295ull>&) + 584 2 dyld objc::PerfectHash::make_perfect(dyld3::OverflowSafeArray<objc::PerfectHash::key, 4294967295ull>&, objc::PerfectHash&) + 124 3 dyld objc::PerfectHash::make_perfect(dyld3::OverflowSafeArray<char const*, 4294967295ull> const&, objc::PerfectHash&) + 152 4 dyld dyld4::PrebuiltObjC::generateHashTables(dyld4::RuntimeState&) + 128 5 dyld dyld4::PrebuiltObjC::make(Diagnostics&, dyld4::RuntimeState&) + 2968 6 dyld dyld4::PrebuiltLoaderSet::makeLaunchSet(Diagnostics&, dyld4::RuntimeState&, dyld4::MissingPaths const&) + 468 7 dyld dyld4::prepare(dyld4::APIs&, dyld3::MachOAnalyzer const*) + 2920 8 dyld start + 1724 MetricKitLog.txt diagnostic.json

How do I switch a thread in my app to use ARM’s big endian mode? The thread code is complied in with the app using Xcode; however other ways of compiling/linking such as libraries, support threads or even cooperative apps might work. Open to ideas. I need to get the iPad processor into big endian mode. Please feel free to ask for any additional information. Best, BR.

I'm working on a macOS background app which hide mouse cursor for all apps. I use eventTap to listen keystroke, then call CGDisplayHideCursor and SetsCursorInBackground trick to hide cursor when specific key is down. It works on most case, except one - when mouse hover on dock. I'm not sure why mouse cursor can't be hidden when over dock, maybe some kind of elevated privilege? Is there a way to hide it? Thanks.

I'm using a file descriptor to write into a file. I've encountered a problem where if the underlying file is removed or recreated, the file descriptor becomes unstable. I have no reliable way to confirm if it's writing on the expected file. let url = URL(fileURLWithPath: "/path/") try FileManager.default.removeItem(at: url) FileManager.default.createFile(atPath: url.path, contents: .empty) let filePath = FilePath(url.path) var fileDescriptor = try FileDescriptor.open(filePath, .readWrite) // The file is recreated - may be done from a different process. try FileManager.default.removeItem(at: url) // L9 FileManager.default.createFile(atPath: url.path, contents: .empty) // L10 let dataToWrite = Data([1,1,1,1]) try fileDescriptor.writeAll(dataToWrite) // L13 let dataWritten = try Data(contentsOf: url) print(dataToWrite == dataWritten) // false I would expect L13 to result in an error. Given it doesn't: Is there a way to determine where fileDescriptor is writing? Is there a way to ensure that fileDescriptor is writing the content in the expected filePath?

Hi :wave: I started a new project to experiment with EndpointSecurity framework. It seems to have been worked, but when I try to add XPC I face some troubles. I am not able to send XPC message from my app to my system extension. No runtime error, but when I'm inspecting logs: That correspond to this code: https://github.com/tony-go/TestES/blob/main/Extension/main.swift#L21-L30 Full project: https://github.com/tony-go/TestES/ I thought at first that it could come from a missing @objc somehere but it does not seems ... I also wonder why I cannot catch this error at runtime ?

My MBP 2019 with i9T2Chip was working with a DualBoot Monterey (on MacintoshHD) and Ventura (on other partition) and after installing the latest Ventura Update on that partition, the main Monterey Partition won't start up, and as a dive in shows, figures now with Sonoma 14.5 SystemVersion.plist I can't figure out what happened, 4 days ago I updated Monterey to 12.7.5, today I booted, read some news during breakfast and then switched partition to update the Ventura OS to it's latest update. After trying to switch back to monterey the monterey partition is in an endless boot-loop. It forwards a little then the screen flickers, the mouse appears, the boot bar jumps to the end and then black screen and later showing recovery asking for internet conection to verify the disk. Fortunately the Ventura Partition allows still to boot, so I started up, Diskutilities did not help, NVRAM reset, SMC reset, startup in diagnose mode, all with no result. I tried to reinstall Monterey over internet: preflight error 21, made a usb installer, chose monterey partition with error "Cannot downgrade"... That made me wonder: why downgrade? it's the same system version, but the startup disk menu indicated 14.5 for the monterey partition... So I deep dived into /System/Library/CoreServices/SystemVersion.plist and there it was the monterey SystemVersion became somehow Sonoma, even if sonoma is not installed, and was not installed nor installing... It was a clean reboot from Monterey into Sonoma. My only guess is that the Ventura update messed up something, but how and why???? no clue. Can anyone help me on how I could reset the systemVersion to Monterey so that I can make a clean install? I have a one month old TimeMachine Backup, and off course I could upgrade to sonoma, but I'd prefere to have Monterey or Ventura on that Partition, as the other one is for DAW compatibility tests... <?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>BuildID</key> <string>4805124E-0C37-11EF-BC27-82EAA8E0F66E</string> <key>ProductBuildVersion</key> <string>23F79</string> <key>ProductCopyright</key> <string>1983-2024 Apple Inc.</string> <key>ProductName</key> <string>macOS</string> <key>ProductUserVisibleVersion</key> <string>14.5</string> <key>ProductVersion</key> <string>14.5</string> <key>iOSSupportVersion</key> <string>17.5</string> </dict> </plist>

I want to traverse my local Google Drive folder to calculate the size of all the files on my drive. I'm not interested in files or directories that are not present locally. I use getattrlistbulk for traversing and it takes way too much time. I think it is because FileProvider tries to download metadata for the directories that are not yet materialised. Is there a way to skip non-materialised directories?

It looks like macOS Sonoma doesn't delete /tmp files in containers periodically or on reboot, like it does for system /tmp or $TMPDIR. Is it a bug or is it in on purpose? Our app didn't delete its temp files and some users have quite a few of them. We will make the fix so that we clear after ourselves in the future but should we delete temp files manually on start for existing users?

Hello, I'm trying to determine if my application is not releasing all security scoped resources and I'm curious if there's a way to view the count of all currently accessed URLs. I am balancing all startAccessingSecurityScopedResource calls that return true with a stopAccessingSecurityScopedResource, but sometimes my application is unresponsive when my mac wakes from sleep. Console logs indicate some Sandboxing issues. Unresponsiveness is resolved by a force-quit and restart of the application. I'd like to try and observe what's going on with the number of Security Scoped resources to get to the bottom of this. Is it possible?

Play media intents suggested via INUpcomingMediaManager.setSuggestedMediaIntents(_:) have been shown on the iOS lock screen in past iOS versions. In iOS 16/17 play media intents seem to be only shown within the Siri suggestions in the spotlight overlay and in the Siri suggestion widget. When the intents were shown on the lock screen, it was possible to open a preview via long press. Similar to notification previews. Preview support could be implemented with an Intents UI extension. Is there still any place in current iOS versions where play media intents are surfaced and a preview can be opened? In the spotlight overlay a long press has no effect.

When upgrading to macOS 14.5, the FileProvider extension is consistently restarted by the system. This issue was not encountered with macOS 14.0, where the FileProvider extension typically remained uninterrupted. Additionally, I observed that when adding multiple domains using the same process, only one FileProvider extension would operate in 14.0, whereas in 14.5, a separate extension runs for each domain. I haven't found any release notes mentioning this change. Is this behavior intended? I also have filled a feedback FB13810567.

So after multiple attempts over the course of a couple days. I was able to restore my girl friends iPhone. Like others the iPhone was stuck in a boot loop due to not having enough storage on the phone, which was false but anyway, Some tips I gathered after failed attempts is to make sure your laptop is updated to the most recent OS and has available storage of atleast 8.11 gb to use. next step once you get to finder only click restore. do not click update or it will not work. Once you click restore, it will prompt for the update and restore process to occur. After that you wait for everything to process and the phone should be restored/updated and you will be able to do an iCloud back up.