Hi,
I'm trying to create a launch daemon that uses XPC to receive requests from an unprivileged app. Ultimately both components will be written in Go. For now I'm trying to write a PoC in Objective-C to make sure I get everything right, so I'm compiling / signing from the CLI, and writing plist files by hand -- I'm not using XCode.
My current daemon code is pretty much the same as the boilerplate code that XCode generates when creating a new 'XPC Service':
#import <stdio.h>
#include <xpc/xpc.h>
int main(int argc, char *argv[]) {
xpc_rich_error_t error;
dispatch_queue_t queue = dispatch_queue_create("com.foobar.daemon", DISPATCH_QUEUE_SERIAL);
xpc_listener_t listener = xpc_listener_create(
"com.foobar.daemon",
queue,
XPC_LISTENER_CREATE_NONE,
^(xpc_session_t _Nonnull peer) {
xpc_session_set_incoming_message_handler(peer, ^(xpc_object_t _Nonnull message) {
int64_t firstNumber = xpc_dictionary_get_int64(message, "firstNumber");
int64_t secondNumber = xpc_dictionary_get_int64(message, "secondNumber");
// Create a reply and send it back to the client.
xpc_object_t reply = xpc_dictionary_create_reply(message);
xpc_dictionary_set_int64(reply, "result", firstNumber + secondNumber);
xpc_rich_error_t replyError = xpc_session_send_message(peer, reply);
if (replyError) {
printf("Reply failed, error: %s", xpc_rich_error_copy_description(replyError));
}
});
},
&error);
if (error != NULL) {
printf("ERROR: %s\n", xpc_rich_error_copy_description(error));
exit(1);
}
printf("Created listener: %s", xpc_listener_copy_description(listener));
// Resuming the serviceListener starts this service. This method does not return.
dispatch_main();
return 0;
}
I'm compiling, signing and installing my daemon with the following commands:
build_foobar() {
clang -Wall -x objective-c -o com.foobar.daemon poc/main.m
codesign --force --verify --verbose --options=runtime \
--identifier="com.foobar.daemon" \
--sign="Mac Developer: Albin Kerouanton (XYZ)" \
--entitlements=poc/entitlements.plist \
com.foobar.daemon
}
install_foobar() {
sudo cp com.foobar.daemon /Library/PrivilegedHelperTools/com.foobar.daemon
sudo cp poc/com.foobar.daemon.plist /Library/LaunchDaemons/com.foobar.daemon.plist
sudo launchctl bootout system/com.foobar.daemon || true
sudo launchctl bootstrap system /Library/LaunchDaemons/com.foobar.daemon.plist
}
Here's the content of my entitlements.plist file:
<?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.application-identifier</key>
<string>ABCD.com.foobar.daemon</string>
</dict>
</plist>
And finally, here's my launchd plist file:
<?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>Label</key>
<string>com.foobar.daemon</string>
<key>Program</key>
<string>/Library/PrivilegedHelperTools/com.foobar.daemon</string>
<key>ProgramArguments</key>
<array>
<string>/Library/PrivilegedHelperTools/com.foobar.daemon</string>
</array>
<key>RunAtLoad</key>
<false/>
<key>StandardOutPath</key>
<string>/tmp/com.foobar.daemon.out.log</string>
<key>StandardErrorPath</key>
<string>/tmp/com.foobar.daemon.err.log</string>
<key>Debug</key>
<true/>
</dict>
</plist>
Whenever I start my service using sudo launchctl start com.foobar.daemon, it exits with the following error message:
ERROR: Unable to activate listener: failed at listener activation with error 1 - Operation not permitted
System logs don't show anything interesting -- they're just repeating the same error message. I tried to add / remove some properties from both the entitlement and the launchd plist file but to no avail.
Any idea what's going wrong?
Processes & Concurrency
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Testing Environment:
iOS Version: 26.0 Beta 7
Xcode Version: 17.0 Beta 6
Device: iPhone 16 Pro
Description:
We are implementing the new BGContinuedProcessingTask API and are using the wildcard identifier notation as described in the official documentation. Our Info.plist is correctly configured with a permitted identifier pattern, such as com.our-bundle.export.*.
We then register a single launch handler for this exact wildcard pattern. We are performing this registration within a UIViewController, which is a supported pattern as BGContinuedProcessingTask is explicitly exempt from the "register before applicationDidFinishLaunching" requirement, according to the BGTaskScheduler.h header file. The register method correctly returns true, indicating the registration was successful.
However, when we then try to submit a task with a unique identifier that matches this pattern (e.g., com.our-bundle.export.UUID), the BGTaskScheduler.shared.submit() call throws an NSInternalInconsistencyException and terminates the app. The error reason is: 'No launch handler registered for task with identifier com.our-bundle.export.UUID'.
This indicates that the system is not correctly matching the specific, unique identifier from the submit call to the registered wildcard pattern handler. This behavior contradicts the official documentation.
Steps to Reproduce:
Create a new Xcode project.
In Signing & Capabilities, add "Background Modes" (with "Background processing" checked) and "Background GPU Access".
Add a permitted identifier (e.g., "com.company.test.*") to BGTaskSchedulerPermittedIdentifiers in Info.plist.
In a UIViewController's viewDidLoad, register a handler for the wildcard pattern. Check that the register method returns true.
Immediately after, try to submit a BGContinuedProcessingTaskRequest with a unique identifier that matches the pattern.
Expected Results:
The submit call should succeed without crashing, and the task should be scheduled.
Actual Results:
The app crashes immediately upon calling submit(). The console shows an uncaught NSInternalInconsistencyException with the reason: 'No launch handler registered for task with identifier com.company.test.UUID'.
Workaround:
The issue can be bypassed if we register a new handler for each unique identifier immediately before submitting a request with that same unique identifier. This strongly suggests the bug is in the system's wildcard pattern-matching logic.
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!
Problem summary
I have a macOS helper app that is launched from a sandboxed main app. The helper:
has com.apple.security.app-sandbox = true and com.apple.security.inherit = true in its entitlements,
is signed and embedded inside the main app bundle (placed next to the main executable in Contents/MacOS),
reports entitlement_check = 1 (code signature contains sandbox entitlement, implemented via SecStaticCode… check),
sandbox_check(getpid(), NULL, 0) returns 1 (runtime sandbox enforcement present),
APP_SANDBOX_CONTAINER_ID environment variable is not present (0).
Despite that, Cocoa APIs return non-container home paths:
NSHomeDirectory() returns /Users/<me>/ (the real home).
[[NSFileManager defaultManager] URLsForDirectory:inDomains:] and
URLForDirectory:inDomain:appropriateForURL:create:error: return paths rooted at /Users/<me>/ (not under ~/Library/Containers/<app_id>/Data/...) — i.e. they look like non-sandboxed locations.
However, one important exception: URLForDirectory:... for NSItemReplacementDirectory (temporary/replacement items) does return a path under the helper's container (example: ~/Library/Containers/<app_id>/Data/tmp/TemporaryItems/NSIRD_<helper_name>_hfc1bZ).
This proves the sandbox is active for some FileManager APIs, yet standard directory lookups (Application Support, Documents, Caches, and NSHomeDirectory()) are not being redirected to the container.
What I expect
The helper (which inherits the sandbox and is clearly sandboxed) should get container-scoped paths from Cocoa’s FileManager APIs (Application Support, Documents, Caches), i.e. paths under the helper’s container: /Users/<me>/Library/Containers/<app_id>/Data/....
What I tried / diagnostics already gathered
Entitlements & code signature
codesign -d --entitlements :- /path/to/Helper.app/Contents/MacOS/Helper
# shows com.apple.security.app-sandbox = true and com.apple.security.inherit = true
Runtime checks (Objective-C++ inside helper):
extern "C" int sandbox_check(pid_t pid, const char *op, int flags);
NSLog(@"entitlement_check = %d", entitlement_check()); // SecStaticCode check
NSLog(@"env_variable_check = %d", (getenv("APP_SANDBOX_CONTAINER_ID") != NULL));
NSLog(@"runtime_sandbox_check = %d", sandbox_check(getpid(), nullptr, 0));
NSLog(@"NSHomeDirectory = %s", NSHomeDirectory());
NSArray *urls = [[NSFileManager defaultManager]
URLsForDirectory:NSApplicationSupportDirectory
inDomains:NSUserDomainMask];
NSLog(@"URLsForDirectory: %@", urls);
Observed output:
entitlement_check = 1
env_variable_check = 0
runtime_sandbox_check = 1
NSHomeDirectory = /Users/<me>
URLsForDirectory: ( "file:///Users/<me>/Library/Application%20Support/..." )
Temporary/replacement directory (evidence sandbox active for some APIs):
NSURL *tmpReplacement = [[NSFileManager defaultManager]
URLForDirectory:NSItemReplacementDirectory
inDomain:NSUserDomainMask
appropriateForURL:nil
create:YES
error:&err];
NSLog(@"NSItemReplacementDirectory: %@", tmpReplacement.path);
Observed output (example):
/Users/<me>/Library/Containers/<app_id>/Data/tmp/TemporaryItems/NSIRD_<helper_name>_hfc1bZ
Other facts
Calls to NSHomeDirectory() and URLsForDirectory: are made after main() to avoid "too early" initialization problems.
Helper is placed in Contents/MacOS (not Contents/Library/LoginItems).
Helper is a non-GUI helper binary launched by the main app (not an XPC service).
macOS version: Sequoia 15.6
Questions
Why do NSHomeDirectory() and URLsForDirectory: return the real /Users/<me>/... paths in a helper process that is clearly sandboxed (entitlement + runtime enforcement), while NSItemReplacementDirectory returns a container-scoped temporary path?
Is this behavior related to how the helper is packaged or launched (e.g., placement in Contents/MacOS vs Contents/Library/LoginItems, or whether it is launched with posix_spawn/fork+exec vs other APIs)?
Are there additional entitlements or packaging rules required for a helper that inherits sandbox to have Cocoa directory APIs redirected to the container (for Application Support, Documents, Caches)?
*Thanks in advance — I can add any requested logs
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 ?
Topic:
App & System Services
SubTopic:
Processes & Concurrency
Tags:
External Accessory
Swift
Core Bluetooth
Concurrency
I abandoned Mac development back around 10.4 when I departed Apple and am playing catch-up, trying to figure out how to register a privileged helper tool that can execute commands as root in the new world order. I am developing on 13.1 and since some of these APIs debuted in 13, I'm wondering if that's ultimately the root of my problem.
Starting off with the example code provided here:
https://developer.apple.com/documentation/servicemanagement/updating-your-app-package-installer-to-use-the-new-service-management-api
Following all build/run instructions in the README to the letter, I've not been successful in getting any part of it to work as documented. When I invoke the register command the test app briefly appears in System Settings for me to enable, but once I slide the switch over, it disappears. Subsequent attempts to invoke the register command are met only with the error message:
`Unable to register Error Domain=SMAppServiceErrorDomain Code=1 "Operation not permitted" UserInfo={NSLocalizedFailureReason=Operation not permitted}
The app does not re-appear in System Settings on these subsequent invocations. When I invoke the status command the result mysteriously equates to SMAppService.Status.notFound.
The plist is in the right place with the right name and it is using the BundleProgram key exactly as supplied in the sample code project. The executable is also in the right place at Contents/Resources/SampleLaunchAgent relative to the app root.
The error messaging here is extremely disappointing and I'm not seeing any way for me to dig any further without access to the underlying Objective-C (which the Swift header docs reference almost exclusively, making it fairly clear that this was a... Swift... Port... [Pun intended]).
I'm developing a macOS console application that uses ODBC to connect to PostgreSQL. The application works fine when run normally, but fails to load the ODBC driver when debugging with LLDB(under root works fine as well).
Error Details
When running the application through LLDB, I get this sandbox denial in the system log (via log stream):
Error 0x0 0 0 kernel: (Sandbox) Sandbox: logd_helper(587) deny(1) file-read-data /opt/homebrew/lib/psqlodbcw.so
The application cannot access the PostgreSQL ODBC driver located at /opt/homebrew/lib/psqlodbcw.so(also tried copy to /usr/local/lib/...).
Environment
macOS Version: Latest Sequoia
LLDB: Using LLDB from Xcode 16.3 (/Applications/Xcode16.3.app/Contents/Developer/usr/bin/lldb)
ODBC Driver: PostgreSQL ODBC driver installed via Homebrew
Code Signing: Application is signed with Apple Development certificate
What is the recommended approach for debugging applications that need to load dynamic libraries?
Are there specific entitlements or configurations that would allow LLDB to access ODBC drivers during debugging sessions?
Any guidance would be greatly appreciated.
Thank you for any assistance!
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];
The following code worked as expected on iOS 26 RC, but it no longer works on the official release of iOS 26.
Is there something I need to change in order to make it work on the official version?
Registration
BGTaskScheduler.shared.register(
forTaskWithIdentifier: taskIdentifier,
using: nil
) { task in
//////////////////////////////////////////////////////////////////////
// This closure is not called on the official release of iOS 26
//////////////////////////////////////////////////////////////////////
let task = task as! BGContinuedProcessingTask
var shouldContinue = true
task.expirationHandler = {
shouldContinue = false
}
task.progress.totalUnitCount = 100
task.progress.completedUnitCount = 0
while shouldContinue {
sleep(1)
task.progress.completedUnitCount += 1
task.updateTitle("\(task.progress.completedUnitCount) / \(task.progress.totalUnitCount)", subtitle: "any subtitle")
if task.progress.completedUnitCount == task.progress.totalUnitCount {
break
}
}
let completed = task.progress.completedUnitCount >= task.progress.totalUnitCount
if completed {
task.updateTitle("Completed", subtitle: "")
}
task.setTaskCompleted(success: completed)
}
Request
let request = BGContinuedProcessingTaskRequest(
identifier: taskIdentifier,
title: "any title",
subtitle: "any subtitle",
)
request.strategy = .queue
try BGTaskScheduler.shared.submit(request)
Sample project code:
https://github.com/HikaruSato/ExampleBackgroundProcess
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 troubleshooting a crash I do not understand.
I have a queue called DataQueue which never has anything dispatched to it - it's the sample buffer delegate of an AVCaptureVideoDataOutput. It can call DispatchQueue.main.sync to do some work on the main thread.
It works fine no matter what we test, but has some crashes in the field that I need to fix. Here's it crashing:
AppleCameraDataDelegate.dataQueue
0 libsystem_kernel.dylib 0x7bdc __ulock_wait + 8
1 libdispatch.dylib 0x4a80 _dlock_wait + 52
2 libdispatch.dylib 0x486c _dispatch_thread_event_wait_slow$VARIANT$mp + 52
3 libdispatch.dylib 0x113d8 __DISPATCH_WAIT_FOR_QUEUE__ + 332
4 libdispatch.dylib 0x10ff0 _dispatch_sync_f_slow + 140
The main thread isn't doing something I asked it to, but appears to be busy:
Thread
0 libsystem_kernel.dylib 0x71a4 __psynch_cvwait + 8
1 libsystem_pthread.dylib 0x7fd8 _pthread_cond_wait$VARIANT$mp + 1232
2 grpc 0x2cb670 gpr_cv_wait + 131 (sync.cc:131)
3 grpc 0x119688 grpc_core::Executor::ThreadMain(void*) + 225 (executor.cc:225)
4 grpc 0x2e023c grpc_core::(anonymous namespace)::ThreadInternalsPosix::ThreadInternalsPosix(char const*, void (*)(void*), void*, bool*, grpc_core::Thread::Options const&)::'lambda'(void*)::__invoke(void*) + 146 (thd.cc:146)
5 libsystem_pthread.dylib 0x482c _pthread_start + 104
6 libsystem_pthread.dylib 0xcd8 thread_start + 8
Can anyone help me understand why this is a crash?
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.
Topic:
App & System Services
SubTopic:
Processes & Concurrency
Tags:
HealthKit
SwiftUI
Background Tasks
SwiftData
We have an application that sets a code signing requirement on a XPC connection between a File Provider extension and the main application. Only with a specific Developer ID certificate <DEVELOPER_ID_TEAM_IDENTIFIER> that designated requirement is not accepted and the application crashes with EXC_CRASH (SIGABRT) and the stacktrace
Thread 1 Crashed:: Dispatch queue: com.apple.root.default-qos
0 libsystem_kernel.dylib 0x19b556388 __pthread_kill + 8
1 libsystem_pthread.dylib 0x19b58f88c pthread_kill + 296
2 libsystem_c.dylib 0x19b498a3c abort + 124
3 libc++abi.dylib 0x19b545384 abort_message + 132
4 libc++abi.dylib 0x19b533cf4 demangling_terminate_handler() + 344
5 libobjc.A.dylib 0x19b1b8dd4 _objc_terminate() + 156
6 libc++abi.dylib 0x19b544698 std::__terminate(void (*)()) + 16
7 libc++abi.dylib 0x19b547c30 __cxxabiv1::failed_throw(__cxxabiv1::__cxa_exception*) + 88
8 libc++abi.dylib 0x19b547bd8 __cxa_throw + 92
9 libobjc.A.dylib 0x19b1aecf8 objc_exception_throw + 448
10 Foundation 0x19d5c3840 -[NSXPCConnection setCodeSigningRequirement:] + 140
11 libxpcfileprovider.dylib 0x301023048 NSXPCConnection.setCodeSigningRequirementFromTeamIdentifier(_:) + 1796
12 libxpcfileprovider.dylib 0x30101dc94 closure #1 in CallbackFileProviderManager.getFileProviderConnection(_:service:completionHandler:interruptionHandler:exportedObject:) + 1936
13 libxpcfileprovider.dylib 0x30101e110 thunk for @escaping @callee_guaranteed @Sendable (@guaranteed NSXPCConnection?, @guaranteed Error?) -> () + 80
14 Foundation 0x19d46c3a4 __72-[NSFileProviderService getFileProviderConnectionWithCompletionHandler:]_block_invoke_2.687 + 284
15 libdispatch.dylib 0x19b3d7b2c _dispatch_call_block_and_release + 32
16 libdispatch.dylib 0x19b3f185c _dispatch_client_callout + 16
17 libdispatch.dylib 0x19b40e490 + 32
18 libdispatch.dylib 0x19b3e9fa4 _dispatch_root_queue_drain + 736
19 libdispatch.dylib 0x19b3ea5d4 _dispatch_worker_thread2 + 156
20 libsystem_pthread.dylib 0x19b58be28 _pthread_wqthread + 232
21 libsystem_pthread.dylib 0x19b58ab74 start_wqthread + 8
The designated codesign requirement on the XPC connection is set to
anchor apple generic and certificate leaf[subject.OU] = <DEVELOPER_ID_TEAM_IDENTIFIER>"
We have verified the designated code sign requirement to be valid on both the main bundle and the embedded extension using:
codesign --verify -v -R '=anchor apple generic and certificate leaf[subject.OU] = "<DEVELOPER_ID_TEAM_IDENTIFIER>"' *.app
codesign --verify -v -R '=anchor apple generic and certificate leaf[subject.OU] = "<DEVELOPER_ID_TEAM_IDENTIFIER>"' *.app/Contents/PlugIns/*
In iOS Background Execution limits, I see this:
When the user ‘force quits’ an app by swiping up in the multitasking UI, iOS interprets that to mean that the user doesn’t want the app running at all. iOS also sets a flag that prevents the app from being launched in the background. That flag gets cleared when the user next launches the app manually.
However, I see that when I close an app on iPadOS 26 with the red X, the app doesn't appear in the multitasking UI. So are they treated as force closes and prevented from running background tasks?
I'm trying to understand how the API works to perform a function that can continue running if the user closes the app. For a very simple example, consider a function that increments a number on screen every second, counting from 1 to 100, reaching completion at 100. The user can stay in the app for 100s watching it work to completion, or the user can close the app say after 2s and do other things while watching it work to completion in the Live Activity.
To do this when the user taps a Start Counting button, you'd
1 Call BGTaskScheduler.shared.register(forTaskWithIdentifier:using:launchHandler:).
Question 1: Do I understand correctly, all of the logic to perform this counting operation would exist entirely in the launchHandler block (noting you could call another function you define passing it the task to be able to update its progress)? I am confused because the documentation states "The system runs the block of code for the launch handler when it launches the app in the background." but the app is already open in the foreground. This made me think this block is not going to be invoked until the user closes the app to inform you it's okay to continue processing in the background, but how would you know where to pick up. I want to confirm my thinking was wrong, that all the logic should be in this block from start to completion of the operation, and it's fine even if the app stays in the foreground the whole time.
2 Then you'd create a BGContinuedProcessingTaskRequest and set request.strategy = .fail for this example because you need it to start immediately per the user's explicit tap on the Start Counting button.
3 Call BGTaskScheduler.shared.submit(request).
Question 2: If the submit function throws an error, should you handle it by just performing the counting operation logic (call your function without passing a task)? I understand this can happen if for some reason the system couldn't immediately run it, like if there's already too many pending task requests. Seems you should not show an error message to the user, should still perform the request and just not support background continued processing for it (and perhaps consider showing a light warning "this operation can't be continued in the background so keep the app open"). Or should you still queue it up even though the user wants to start counting now? That leads to my next question
Question 3: In what scenario would you not want the operation to start immediately (the queue behavior which is the default), given the app is already in the foreground and the user requested some operation? I'm struggling to think of an example, like a button titled Compress Photos Whenever You Can, and it may start immediately or maybe it won't? While waiting for the launchHandler to be invoked, should the UI just show 0% progress or "Pending" until the system can get to this task in the queue? Struggling to understand the use cases here, why make the user wait to start processing when they might not even intend to close the app during the operation?
Thanks for any insights! As an aside, a sample project with a couple use cases would have been incredibly helpful to understand how the API is expected to be used.
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.
Topic:
App & System Services
SubTopic:
Processes & Concurrency
Tags:
Entitlements
Objective-C
Command Line Tools
App Sandbox
Hello everyone!
I'm having a problem with background tasks running in the foreground.
When a user enters the app, a background task is triggered. I've written some code to check if the app is in the foreground and to prevent the task from running, but it doesn't always work. Sometimes the task runs in the background as expected, but other times it runs in the foreground, as I mentioned earlier.
Could it be that I'm doing something wrong? Any suggestions would be appreciated.
here is code:
class BackgroundTaskService {
@Environment(\.scenePhase) var scenePhase
static let shared = BackgroundTaskService()
private init() {}
// MARK: - create task
func createCheckTask() {
let identifier = TaskIdentifier.check
BGTaskScheduler.shared.getPendingTaskRequests { requests in
if requests.contains(where: { $0.identifier == identifier.rawValue }) {
return
}
self.createByInterval(identifier: identifier.rawValue, interval: identifier.interval)
}
}
private func createByInterval(identifier: String, interval: TimeInterval) {
let request = BGProcessingTaskRequest(identifier: identifier)
request.earliestBeginDate = Date(timeIntervalSinceNow: interval)
scheduleTask(request: request)
}
// MARK: submit task
private func scheduleTask(request: BGProcessingTaskRequest) {
do {
try BGTaskScheduler.shared.submit(request)
} catch {
// some actions with error
}
}
// MARK: background actions
func checkTask(task: BGProcessingTask) {
let today = Calendar.current.startOfDay(for: Date())
let lastExecutionDate = UserDefaults.standard.object(forKey: "lastCheckExecutionDate") as? Date ?? Date.distantPast
let notRunnedToday = !Calendar.current.isDate(today, inSameDayAs: lastExecutionDate)
guard notRunnedToday else {
task.setTaskCompleted(success: true)
createCheckTask()
return
}
if scenePhase == .background {
TaskActionStore.shared.getAction(for: task.identifier)?()
}
task.setTaskCompleted(success: true)
UserDefaults.standard.set(today, forKey: "lastCheckExecutionDate")
createCheckTask()
}
}
And in AppDelegate:
BGTaskScheduler.shared.register(forTaskWithIdentifier: "check", using: nil) { task in
guard let task = task as? BGProcessingTask else { return }
BackgroundTaskService.shared.checkNodeTask(task: task)
}
BackgroundTaskService.shared.createCheckTask()
I'm working on an enterprise product that's mainly a daemon (with Endpoint Security) without any GUI component. I'm looking into the update process for daemons/agents that was introduced with Ventura (Link), but I have to say that the entire process is just deeply unfun. Really can't stress this enough how unfun.
Anyway...
The product bundle now contains a dedicated Swift executable that calls SMAppService.register for both the daemon and agent.
It registers the app in the system preferences login items menu, but I also get an error.
Error registering daemon: Error Domain=SMAppServiceErrorDomain Code=1 "Operation not permitted" UserInfo={NSLocalizedFailureReason=Operation not permitted}
What could be the reason?
I wouldn't need to activate the items, I just need them to be added to the list, so that I can control them via launchctl.
Which leads me to my next question, how can I control bundled daemons/agents via launchctl? I tried to use launchctl enable and bootstrap, just like I do with daemons under /Library/LaunchDaemons, but all I get is
sudo launchctl enable system/com.identifier.daemon
sudo launchctl bootstrap /Path/to/daemon/launchdplist/inside/bundle/Library/LaunchDaemons/com.blub.plist
Bootstrap failed: 5: Input/output error (not super helpful error message)
I'm really frustrated by the complexity of this process and all of its pitfalls.
Hello, I'm developing a Mac application that uses a network extension. I'm trying to implement XPC to pass data between my main app and system extension and I'm using the SimpleFirewall demo app as a guide to do this. One thing I can't understand is how the ViewController in the SimpleFirewall main app has access to the class IPCConnection in the SimpleFirewallExtension without it being public and without SimpleFirewallExtension being imported in ViewController.
Topic:
App & System Services
SubTopic:
Processes & Concurrency
Tags:
XPC
System Extensions
Network Extension
Hello,
I have a few questions regarding the documentation here:
Can this method described in the article be built with Xcode 26 and run on iOS 26? Or is it restricted to run only on iOS 26, since AppExtensionPoint appears to be available starting from iOS 26?
Does this approach allow two apps under the same Team ID to communicate with each other?
Does this approach also allow two apps under different Team IDs to communicate with each other?
Is it mandatory to implement EXAppExtensionBrowserViewController and obtain user consent before using this method to exchange information?
In our implementation, we followed the documentation. Inside EXAppExtensionBrowserViewController, we were able to see the Generic Extension from another app and enabled the permission.
However, we still get the following error:
Failed to connect: Error Domain=NABUExtensionConnector Code=1
"No matching extension found"
UserInfo={NSLocalizedDescription=No matching extension found}
Could someone clarify whether this is expected behavior, or if we are missing an additional configuration step?
Thanks in advance!