I have BGProcessingTask & BGAppRefreshTask working fine. The main purpose of my use of BGProcessingTask is to upload a file to AWS S3 using multipart/form-data. I have found that any file above about 2.5MB times out after running almost four minutes. If I run the same RESTful api using curl or Postman, I can upload a 25MB file in 3 seconds or less. I have tried to deliberately set .earliestBeginDate to 01:00 or 02:00 local time on the iPhone, but that does not seem to help. I use the delegate (yes, I am writing in Objective C) - URLSession:task:didSendBodyData:totalBytesSent:totalBytesExpectedToSend: and find that the iOS system uploads about 140kB every 15 seconds or so. I am looking for recommendations or insight into how I might enable uploads of 25MB files. I would be happy it I could do just one a day for my use case. I provide code on how I set up the NSURLSession and NSURLSessionDownloadTask, as it is my guess that if there is something that needs to be modified it is there. I have to believe there is a solution for this since I read in many posts here and in StackOverflow how developers are using this functionality for uploading many, many files. NSURLSessionConfiguration *sConf = [NSURLSessionConfiguration backgroundSessionConfigurationWithIdentifier:bkto.taskIdentifier]; sConf.URLCache = [NSURLCache sharedURLCache]; sConf.waitsForConnectivity = YES; sConf.allowsCellularAccess = NO; sConf.networkServiceType = NSURLNetworkServiceTypeVideot; sConf.multipathServiceType = NSURLSessionMultipathServiceTypeNone; sConf.discretionary = YES; sConf.timeoutIntervalForResource = kONEHOURINTERVAL; sConf.timeoutIntervalForRequest = kONEMINUTEINTERVAL; sConf.allowsExpensiveNetworkAccess = NO ; sConf.allowsConstrainedNetworkAccess = NO; sConf.sessionSendsLaunchEvents = YES; myURLSession = [NSURLSession sessionWithConfiguration:sConf delegate:self delegateQueue:nil]; And then later in the code... NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:pth]]; request.HTTPMethod = kHTTPPOST; request.HTTPBody = [NSData my body data]; request.timeoutInterval = 60; [request setValue:@"*/*" forHTTPHeaderField:@"Accept"]; [request setValue:@"en-us,en" forHTTPHeaderField:@"Accept-Language"]; [request setValue:@"gzip, deflate, br" forHTTPHeaderField:@"Accept-Encoding"]; [request setValue:@"ISO-8859-1,utf-8" forHTTPHeaderField:@"Accept-Charset"]; [request setValue:@"600" forHTTPHeaderField:@"Keep-Alive"]; [request setValue:@"keep-alive" forHTTPHeaderField:@"Connection"]; NSString *contType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",bnd]; [request setValue:contType forHTTPHeaderField:@"Content-Type"]; [request addValue:[NSString stringWithFormat:@"%lu",(unsigned long)myData.length] forHTTPHeaderField:@"Content-Length"]; and here are a few lines from my logs to show the infrequent multi-part uploads of only small chunks of data by the iOS system: -[BKSessionManager URLSession:task:didSendBodyData:totalBytesSent:totalBytesExpectedToSend:]: bytesSent = 393,216 -[BKSessionManager URLSession:task:didSendBodyData:totalBytesSent:totalBytesExpectedToSend:]: totalBytesSent = 393,216 -[BKSessionManager URLSession:task:didSendBodyData:totalBytesSent:totalBytesExpectedToSend:]: task = BackgroundDownloadTask <76A81A80-4703-4686-8742-A0048EB65108>.<2>, time Fri Mar 7 16:25:27 2025 -[BKSessionManager URLSession:task:didSendBodyData:totalBytesSent:totalBytesExpectedToSend:]: bytesSent = 131,072 -[BKSessionManager URLSession:task:didSendBodyData:totalBytesSent:totalBytesExpectedToSend:]: totalBytesSent = 524,288 -[BKSessionManager URLSession:task:didSendBodyData:totalBytesSent:totalBytesExpectedToSend:]: task = BackgroundDownloadTask <76A81A80-4703-4686-8742-A0048EB65108>.<2>, time Fri Mar 7 16:25:42 2025 -[BKSessionManager URLSession:task:didSendBodyData:totalBytesSent:totalBytesExpectedToSend:]: bytesSent = 131,072 -[BKSessionManager URLSession:task:didSendBodyData:totalBytesSent:totalBytesExpectedToSend:]: totalBytesSent = 655,360 -[BKSessionManager URLSession:task:didSendBodyData:totalBytesSent:totalBytesExpectedToSend:]: task = BackgroundDownloadTask <76A81A80-4703-4686-8742-A0048EB65108>.<2>, time Fri Mar 7 16:25:56 2025 -[BKSessionManager URLSession:task:didSendBodyData:totalBytesSent:totalBytesExpectedToSend:]: bytesSent = 131,072 -[BKSessionManager URLSession:task:didSendBodyData:totalBytesSent:totalBytesExpectedToSend:]: totalBytesSent = 786,432

I am encountering an issue with my application, BloxOneEndpoint.pkg, which includes two services: rc_service_infoblox – Runs as the root user. Controller Application – Runs as a normal user. Although a thread within rc_service_infoblox is running fine and performing its expected tasks, I notice that the service appears as "Not Responding" in Activity Monitor. Despite normal functionality, this status is concerning, as it may indicate some issue to customer. I would appreciate any insights into why this might be happening and how to resolve it. Is there a specific API or mechanism I should use to ensure the service remains in a "Running" state in Activity Monitor? Thank you for your guidance.

I'm developing a macOS application that tracks the duration of a user's session using a timer, which is displayed both in the main window and in an menu bar extra view. I have a couple of questions regarding the timer's behavior: What happens to the timer if the user closes the application's window (causing the app to become inactive) but does not fully quit it? Does the timer continue to run, pause, or behave in some other way? Will the app nap feature stop the timer when app is in-active state? When the application is inactive and the system is either in sleep mode or locked, does the timer’s tolerance get affected? In other words, will the timer fire with any additional delay compared to its scheduled time under these conditions?

I'm a developer using Lazarus Pascal, so converting ObjC and Swift comes with its challenges. I'm trying to figure how to properly use SMAppService to add my application as a login item for the App Store. I have learned that the old method (&lt; macOS 13) uses a helper tool, included in the app bundle, which calls the now deprecated SMLoginItemSetEnabled. Now this is already quite a pain to deal with if you're not using XCode, not to mention converting the headers being rather complicated when you're not experienced with doing this. The "new" method (as of macOS 13) is using SMAppService. Can anyone explain how to use this? The documentation (for me anyway) is a not very clear about that and neither are examples that can be found all over the Internet. My main question is: Can I now use the SMAppService functions to add/remove a login item straight in my application, or is a helper tool still required?

Hello, aspiring programmer here. I am developing a StepCounter APP, which keeps track of how many steps I have taken and sends to an MQTT server. I am trying to make this happen even while the app is not in focus, but so far I have not been able to get this working. First tried with silent background music, which seemed pretty inconsistent and inpractical, since I usually play youtube videoes while walking, making the app stop with its silent audio. Then tried GPS, which didnt really do anything (could be implementation problem). Has anyone made background processing work for their apps?

Hello, aspiring programmer here. I am developing a StepCounter APP, which keeps track of how many steps I have taken and sends to an MQTT server. I am trying to make this happen even while the app is not in focus, but so far I have not been able to get this working. First tried with silent background music, which seemed pretty inconsistent and inpractical, since I usually play youtube videoes while walking, making the app stop with its silent audio. Then tried GPS, which didnt really do anything (could be implementation problem). Has anyone made background processing work for their apps?

Hi, I have a hard time getting my head wrapped around the possibilities of running a app or a task in a app in the background. I have a app where I utilize MusicKit to create a playlist in Apple Music, and add songs to the playlist. Now the songs added are picked from choices made by the user, and the total number of songs to add is 75, and that takes some time. And if the user switches to a different app or the phone is locked, the add songs logic stops, and then starts again as soon as the app is active again. What I am trying to achieve is of course for this to keep processing also when the app is not active, so basically to keep it running in the background. But this is where I struggle to understand how I can do that - The available choice seems to be BGTaskScheduler, but that just does not seem correct. From what I understand it just schedules a task, and it will be processed whenever the app or phone "feels like it" (again, my understanding, might be wrong), and that won't work in my scenario. I want the task to start when the user taps a button, and just keep running until it is finished, regardless of if the app is active or not. Any pointers, tips, advices out there on how I can achieve this?

Hello, I have a question about a edge case scenario. Before that some info on my project- I have a launchdaemon that carries out some business logic, it also has XPC listener (built using C APIs). Question- Can there be a situation when the daemon is up and running but the XPC listener is down(due to some error or crash)? If yes then do I need to handle it in my code or launchd will handle it? when the daemon is stopped or shut down, how do I stop the XPC listener? After getting listener object from xpc_connection_create_mach_service should I just call xpc_connection_cancel followed by a call to xpc_release? Thanks! K

I'm trying to schedule a background task that will run on an iPhone and I'm looking into creating a task request using BGProcessingTaskRequest and scheduled it using BGTaskScheduler.shared.submit(). Per earliestBeginDate documentation, this property can be used to specify the earliest time a background task will be launched by OS. All clear here. However, the question is: how is the value interpreted with respect to timezone ? Is the specified date in device timezone ? Is GMT ? Is something else ?

Hi! Could you please point me to the official documentation or recommended approach for launching the host app from a Share Extension? The scenario is: The user is sharing some text to my app. I need launch App and show this text. At the moment, I'm using the following hack: let selector = NSSelectorFromString("sharedApplication") if let app = UIApplication.perform(selector)?.takeUnretainedValue() as? UIApplication, app.responds(to: #selector(UIApplication.open(_:options:completionHandler:))) { app.open(url, options: [:], completionHandler: nil) } This does work, but it's terrible. So, the question: What is the official way to open the host app from within a Share Extension? Thanks!

Hello, I am developing an application which is communicating with external device using BLE and L2CAP. I wonder what are the best practices of using Input & Output streams that are established with L2CAP connection when working with Swift 6 concurrency model. I've been trying to find some examples and hints for some time now but unfortunately there isn't much available. One useful thread I've found is: https://developer.apple.com/forums/thread/756281 but it does not offer much insight into using eg. actor model with streams. I wonder if something has changed in this regards? Also, are there any plans to migrate eg. CoreBluetooth stack to new swift 6 concurrency ?

How can I return the results of a Spotlight query synchronously from a Swift function? I want to return a [String] that contains the items that match the query, one item per array element. I specifically want to find all data for Spotlight items in the /Applications folder that have a kMDItemAppStoreAdamID (if there is a better predicate than kMDItemAppStoreAdamID > 0, please let me know). The following should be the correct query: let query = NSMetadataQuery() query.predicate = NSPredicate(format: "kMDItemAppStoreAdamID > 0") query.searchScopes = ["/Applications"] I would like to do this for code that can run on macOS 10.13+, which precludes using Swift Concurrency. My project already uses the latest PromiseKit, so I assume that the solution should use that. A bonus solution using Swift Concurrency wouldn't hurt as I will probably switch over sometime in the future, but won't be able to switch soon. I have written code that can retrieve the Spotlight data as the [String], but I don't know how to return it synchronously from a function; whatever I tried, the query hangs, presumably because I've called various run loop functions at the wrong places. In case it matters, the app is a macOS command-line app using Swift 5.7 & Swift Argument Parser 1.5.0. The Spotlight data will be output only as text to stdout & stderr, not to any Apple UI elements.

Hi! I'm trying to submit a task request into BGTaskScheduler when I background my app. The backgrounding triggers an update of data to a shared app groups container. I'm currently getting the following error and unsure where it's coming from: *** Assertion failure in -[BGTaskScheduler _unsafe_submitTaskRequest:error:], BGTaskScheduler.m:274 Here is my code: BGAppRefreshTaskRequest *request = [[BGAppRefreshTaskRequest alloc] initWithIdentifier:kRBBackgroundTaskIdentifier]; NSError *error = nil; bool success = [[BGTaskScheduler sharedScheduler] submitTaskRequest:request error:&error];

Dear Apple： We are developing an app for file sharing between mobile devices. We want to create an iOS app that can continue sharing files with other devices even when it is running in the background. We are using WLAN channels for file sharing. Could you please advise on which background persistence measures we should use to ensure the iOS app can maintain file transfer when it goes to the background? Thank you.

I'm developing a medication scheduling app similar to Apple Health's Medications feature, and I'd like some input on my current approach to background tasks. In my app, when a user creates a medication, I generate ScheduledDose objects (with corresponding local notifications) for the next 2 weeks and save them to SwiftData. To ensure this 2-week window stays current, I've implemented a BGAppRefreshTask that runs daily to generate new doses as needed. My concern is whether BGAppRefreshTask is the appropriate mechanism for this purpose. Since I'm not making any network requests but rather generating and storing local data, I'm questioning if this is the right approach. I'm also wondering how Apple Health's Medications feature handles this kind of scheduling. Their app seems to maintain future doses regardless of app usage patterns. Has anyone implemented something similar or can suggest the best background execution API for this type of scenario? Thanks for any guidance you can provide.

I can see a number of events in our error logging service where we track expired BGAppRefreshTask. We use BGAppRefreshTask to update metadata. By looking into those events I can see most of reported expired tasks expired around 2-5 seconds after the app was launched. The documentations says: The system decides the best time to launch your background task, and provides your app up to 30 seconds of background runtime. I expected "up to 30 seconds" to be 10-30 seconds range, not that extremely short. Is there any heuristic that affects how much time the app gets? Is there a way to tell if the app was launched due to the background refresh task? If we have this information we can optimize what the app does during those 5 seconds. Thank you!.

I'm trying to launch a command line app from my objective C application (sandboxed) using NSTask and I keep getting "launch path not accessible" Here is the path: [task setLaunchPath:@"/usr/local/bin/codeview"]; I have set the appropriate attributes for codeview and it is working perfectly when I use it from the command line and /usr/local/bin IS in the $PATH I know I have NSTask configured correctly because this WILL work: [task setLaunchPath:@"/usr/bin/hexdump"]; With the exception being that I'm using a command already in /usr/bin. But I can't copy codeview into /usr/bin due to SIPS. I've tried moving codeview to various other non-SIPS protected locations all to no avail. Must all NSTask commands come from /usr/bin? Where might I put codeview so that it can be launched. Today I'm going to use an older computer and disable SIPS to put my command in /usr/bin and see if that works. If it does. I will do it on my main machine.

Hi everyone, I’m Jaswanth. My friends and I are students working on a project where we’ve developed a website and a companion app. Here’s the key functionality: When two users enter a virtual room, one of them is prompted to download a desktop app. The app is built with Python and uses psutil to check for certain running processes. It does not send any data over the internet. It has a GUI that clearly shows the system is being monitored , it’s not hidden or running in the background silently. We want to sign and notarize the app to make sure it runs on macOS without warning users. However, we’re concerned that since the app accesses system process information, it might be flagged as malicious. Before we pay for the Apple Developer Program, we wanted to ask: Will an app like this (which only reads running processes and does not exfiltrate or hide activity) be eligible for notarization? Thanks in advance for any insights. We'd appreciate any clarity before moving forward. Best, Jaswanth

我在开发 Mac应用完成 后 通过Xcode 上传二进制文件的过程中, 出现了错误, 错误提示: App里面用到的 com.apple.security.application-groups 权限里面 有 group.*** 和 开发者组ID.*** 导致校验失败, 当我单独使用 group.xxx的时候, 我的程序会崩溃 , 因为里面用到了 MachPortRende 进程间通信问题, 这里默认了 开发者组ID.*** 这个路径, 错误详情: 在尝试启动 QuickFox 应用时，程序因权限问题而崩溃。具体的错误信息 bootstrap_check_in 组ID.xxxx.MachPortRendezvousServer.82392: Permission denied (1100) 显示，应用在尝试使用 Mach 端口进行进程间通信时，没有获得足够的权限, 因此 我需要您们的帮助, 如果单独用开发者组ID.*** 我们又没有权限 将数据写入 组ID.xxx里面的文件

Hello, I am programming a CLI tool to partition USB disks. I am calling diskutil to do the work, but I am hitting issues with permissions, it seems. Here is a trial run of the same command running diskutil directly on the terminal vs running from my code: Calling diskutil directly (works as expected) % /usr/sbin/diskutil partitionDisk /dev/disk2 MBR Free\ Space gap 2048S fat32 f-fix 100353S Free\ Space tail 0 Started partitioning on disk2 Unmounting disk Creating the partition map Waiting for partitions to activate Formatting disk2s1 as MS-DOS (FAT32) with name f-fix 512 bytes per physical sector /dev/rdisk2s1: 98784 sectors in 98784 FAT32 clusters (512 bytes/cluster) bps=512 spc=1 res=32 nft=2 mid=0xf8 spt=32 hds=16 hid=2079 drv=0x80 bsec=100360 bspf=772 rdcl=2 infs=1 bkbs=6 Mounting disk Finished partitioning on disk2 /dev/disk2 (disk image): #: TYPE NAME SIZE IDENTIFIER 0: FDisk_partition_scheme +104.9 MB disk2 1: DOS_FAT_32 F-FIX 51.4 MB disk2s1 Calling diskutil programmatically (error -69877) % sudo ./f-fix DEBUG: /usr/sbin/diskutil partitionDisk /dev/disk2 MBR Free Space gap 2048S fat32 f-fix 100353S Free Space tail 0 Started partitioning on disk2 Unmounting disk Error: -69877: Couldn't open device (Is a disk in use by a storage system such as AppleRAID, CoreStorage, or APFS?) Failed to fix drive `/dev/disk2' Source Code The relevant code from my program is this: char *args[16]; int n = 0; args[n++] = "/usr/sbin/diskutil"; args[n++] = "partitionDisk"; args[n++] = (char *)disk; args[n++] = (char *)scheme; (...) args[n++] = NULL; char **parent_env = *_NSGetEnviron(); if (posix_spawnp(&pid, args[0], NULL, NULL, args, parent_env) != 0) return 1; if (waitpid(pid, &status, 0) < 0) return 1; return 0; Question Are there any system protections against running it like so? What could I be missing? Is this a Disk Arbitration issue?