I am located in Taiwan and recently updated my Mac to the latest OS and installed the newest Xcode. However, I’m experiencing extremely slow download speeds when trying to add the iOS 26.2 Simulator Runtime (approx. 8GB) via Xcode > Settings > Platforms.
It is currently downloading at a rate of only 500MB per hour, which is impractical. I have checked the official downloads page but couldn't find a standalone DMG link for this specific version.
My questions are:
Is there a direct download link (DMG) available on the Apple Developer portal for the iOS 26.2 Simulator?
If no direct link exists, are there any recommended methods to accelerate the download? (e.g., using terminal commands or changing DNS settings).
Any help or direct URLs would be greatly appreciated. Thank you!
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Hi, I requested the https://itunes.apple.com/lookup?id=6482849843&country=us for getting the information of Goods puzzle sort challange , but the screenshotUrls in the response was empty. Is iTunes search API has issue with getting the screenshot urls ? Is there any plan to update it ?
Topic:
Developer Tools & Services
SubTopic:
General
How can I allow the popup I am encountering while I run my UI tests with video recording in the Github actions.
Since these tests are running on VMs, it's not possible to manually click Allow. Also the remote robot cannot interact with OS-level dialogs.
I am developing a simple watch app and I use my personal watch for development with Xcode. Personal watch is series 10 gps only.
I have two other watches that I want to use for testing the app, but not needing them to be connected to Xcode. The test watches have cellular option, and I need a cell plan per watch because the watches need to be standalone, not counting initial setup.
To get the standalone cell plan the watches need to be configured using AWFK. Here is what I have tried/current issues.
I switch between all three watches on my phone using the watch app.
Originally tried to put test watches in developer mode, thinking I would connect to Xcode, developer mode is not available when watch is setup using AWFK.
Pushed the watch app to apple connect, setup TestFlight group, added the test users and my phone user, accepted invites
TestFlight is installed on my phone, I see the testflight setup for the watch app
I set a test watch using watch app on the phone, run install for the test app from TestFlight on the phone, spinner moves for awhile then goes back to Install.
I am not able to get the watch app installed on the test watches from the phone. Is what I am attempting to do supported? I haven't found much specific documentation on this. If I pair the test watches as regular watches, set them to developer mode, can I pair them again as AWFK and will developer mode survive the switch? Or is there something really simple that I'm overlooking?
Appreciate any help that can be extended.
I regularly bump into folks confused by this issue, so I thought I’d collect my thoughts on the topic into a single (hopefully) coherent post.
If you have questions or comments, put them in a new thread here on the forums. Feel free to use whatever subtopic and tags that apply to your situation, but make sure to add the Debugging tag so that I see your thread go by.
Share and Enjoy
—
Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"
Testing and Debugging Code Running in the Background
I regularly see questions like this:
My background code works just fine in Xcode but fails when I download the app from the App Store.
or this:
… or fails when I run my app from the Home screen.
or this:
How do I step through my background code?
These suggest a fundamental misunderstanding of how the debugger interacts with iOS’s background execution model. The goal of this post is to explain that misunderstanding so that you can effectively test and debug background code.
Note The focus of this post is iOS. The advice here generally applies to any of iOS’s ‘child’ platforms, so iPadOS, tvOS, and so on. However, there will be some platform specific differences, especially on watchOS. This advice here doesn’t apply to macOS. It’s background execution model is completely different than the one used by iOS.
Understand the Fundamentals
The key point to note here is that the debugger prevents your app from suspending. This has important consequences for iOS’s background execution model. Normally:
iOS suspends your app when it’s in the background.
Once your app is suspended, it becomes eligible for termination. The most common reason for this is that the system wants to recover memory, but it can happen for various other reasons. For example, the system might terminate a suspended app in order to update it.
Under various circumstances your app can continue running after moving to the background. A great example of this is the continued processed task feature, introduced in iOS 26 beta.
Alternatively, your app can be resumed or relaunched in the background to perform some task. For example, the region monitor feature of Core Location can resume or relaunch your app in the background when the user enters or leaves a region.
If no app needs to be executing, the system can sleep the CPU.
None of this happens in the normal way if the debugger is attached to your app, and it’s vital that you take that into account when debugging code that runs in the background.
An Example of the Problem
For an example of how this can cause problems, imagine an app that uses an URLSession background session. A background session will resume or relaunch your app in the background when specific events happen. This involves two separate code paths:
If your app is suspended, the session resumes it in the background.
If your app is terminated, it relaunches it in the background.
Neither code path behaves normally if the debugger is attached. In the first case, the app never suspends, so the resume case isn’t properly exercised. Rather, your background session acts like it would if your app were in the foreground. Normally this doesn’t cause too many problems, so this isn’t a huge concern.
On the other hand, the second case is much more problematic. The debugger prevents your app from suspending, and hence from terminating, and thus you can’t exercise this code path at all.
Seek Framework-Specific Advice
The above is just an example, and there are likely other things to keep in mind when debugging background code for a specific framework. Consult the documentation for the framework you’re working with to see if it has specific advice.
Note For URLSession background sessions, check out Testing Background Session Code.
The rest of this post focuses on the general case, offering advice that applies to all frameworks that support background execution.
Run Your App Outside of Xcode
When debugging background execution, launch your app from the Home screen. For day-to-day development:
Run the app from Xcode in the normal way (Product > Run).
Stop it.
Run it again from the Home screen.
Alternatively, install a build from TestFlight. This accurately replicates the App Store install experience.
Write Code with Debugging in Mind
It’s obvious that, if you run the app without attaching the debugger, you won’t be able to use the debugger to debug it. Rather:
Extract the core logic of your code into libraries, and then write extensive unit tests for those libraries. You’ll be able to debug these unit tests with the debugger.
Add log points to help debug your integration with the system.
Treat your logging as a feature of your product. Carefully consider where to add log points and at what level to log. Check this logging code into your source code repository and ship it — or at least the bulk of it — as part of your final product. This logging will be super helpful when it comes to debugging problems that only show up in the field.
My general advice is that you use the system log for these log points. See Your Friend the System Log for lots of advice on that front.
One of the great features of the system log is that disabled log points are very cheap. In most cases it’s fine to leave these in your final product.
Attach and Detach
In some cases it really is helpful to debug with the debugger. One option here is to attach to your running app, debug a specific thing, and then detach from it. Specifically:
To attach to a running app, choose Debug > Attach to Process > YourAppName in Xcode.
To detach, choose Debug > Detach.
Understand Force Quit
iOS allows users to remove an app from the multitasking UI. This is commonly known as force quit, but that’s not a particularly accurate term:
The multitasking UI doesn’t show apps that are running, it shows apps that have been run by the user. The UI shows recently run apps regardless of whether they’re in the foreground, running in the background, suspended, or terminated. So, removing an app from the UI may not actually quit anything.
Removing an app 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.
Note In some circumstances iOS will not honour this flag. The exact cases where this happens are not documented and have changed over time.
Keep these behaviours in mind as you debug your background execution code. For example, imagine you’re trying to test the URLSession background relaunch code path discussed above. If you force quit your app, you’ll never hit this code path because iOS won’t relaunch your app in the background. Rather, add a debug-only button that causes your app to call exit.
IMPORTANT This suggestion is for debugging only. Don’t include a Quit button in your final app! This is specifically proscribed by QA1561.
Alternatively, if you’re attached to your app with Xcode, simply choose Product > Stop. This is like calling exit; it has no impact on your app’s ability to run in the background.
Test With Various Background App Refresh Settings
iOS puts users in control of background execution via the options in Settings > General > Background App Refresh. Test how your app performs with the following settings:
Background app refresh turned off overall
Background app refresh turned on in general but turned off for your app
Background app refresh turned on in general and turned on for your app
IMPORTANT While these settings are labelled Background App Refresh, they affect subsystems other than background app refresh. Test all of these cases regardless of what specific background execution feature you’re using.
Test Realistic User Scenarios
In many cases you won’t be able to fully test background execution code at your desk. Rather, install a TestFlight build of your app and then use the device as a normal user would. For example:
To test Core Location background execution properly, actual leave your office and move around as a user might.
To test background app refresh, use your app regularly during the day and then put your device on charge at night.
Testing like this requires two things:
Patience
Good logging
The system log may be sufficient here, but you might need to investigate other logging solutions that are more appropriate for your product.
These testing challenges are why it’s critical that you have unit tests to exercise your core logic. It takes a lot of time to run integration tests like this, so you want to focus on integration issues. Before starting your integration tests, make sure that your unit tests have flushed out any bugs in your core logic.
Revision History
2025-08-12 Made various editorial changes.
2025-08-11 First posted.
Hey, I am using the terminal a lot. Since I updated to Sonoma (so, really a long time ago). My prompt or more precise the hostname always changes between three states. Sometimes it is username@Macbook-Pro-of-XXX, sometimes username@MacbookPro and sometimes it's username@xxxxxxxx-yyyy-zzzz-aaaa-bbbbbbbbbbbb. The latter is probably my UUID. Does anyone have a clue why this randomly changes?
I am trying to integrate Apple Music API using MusicKit and need to generate a Developer Token. However, when I try to create a new key from the Certificates, Identifiers & Profiles section, the “Media Services (MusicKit, ShazamKit, Apple Music Feed)” option is grayed out. We are getting the error 'there are no identifiers available that can be associated with the key.' Although we did checkmark 'musickit' in app services.
I have already:
Enrolled in the paid Apple Developer Program
Created a valid App ID under Identifiers
Logged in as the Account Holder
Tried multiple browsers and devices
Despite this, the option remains disabled. Could you please enable this or let me know what further steps I need to take?
Thank you!
Topic:
Developer Tools & Services
SubTopic:
General
Tags:
Apple Music API
Accounts
MusicKit
Developer Program
On macOS, I get a system popup when running UI tests in GitHub saying:
“bash” is requesting to bypass the system private window picker and directly access your screen and audio.
How can I prevent these login and screen access popups from appearing during automated UI tests? Is there an official setup or configuration for running IntelliJ UI tests in CI environments (macOS, Linux, Windows) to avoid such dialogs? My builds run in GitHub Actions VMs, so I can’t manually grant these permissions, and they block the tests.
I am running Appium tests on an iOS 18 simulator, and I am encountering an intermittent issue where the device screen gets locked unexpectedly during the tests. The Appium logs show no errors or unusual activity, and all commands appear to be executed successfully.
However, upon reviewing the device logs, I see entries related to the lock event, but the exact cause remains unclear.
SpringBoard: (SpringBoard) [com.apple.SpringBoard:Common] lockUIFromSource:Boot options:{
SBUILockOptionsLockAutomaticallyKey: 1,
SBUILockOptionsForceLockKey: 1,
SBUILockOptionsUseScreenOffModeKey: 0
}
SpringBoard: (SpringBoard) [com.apple.SpringBoard:Common] -[SBTelephonyManager inCall] 0
SpringBoard: (SpringBoard) [com.apple.SpringBoard:Common] LockUI from source: Now locking
Has anyone experienced similar behavior with Appium on iOS 18, or could there be a setting or configuration in the simulator that is causing this issue?
In the availability and pricing section, we have reviewed the plans and we will be upgrading to 50 or 100 million calls/month but before we do, we have a couple questions.
Does the API have rate limit or throttling?
Do you have additional weather forecast endpoints like hail, radar, or pollen forecast? I see in this thread https://developer.apple.com/forums/thread/795642 that air quality is not available
Thanks
Hi,
I'm generating MusicKit JWT tokens on my backend side and using it on the client side to query the Apple Music API. One concern I have is accidentally over issuing the scope of this JWT, resulting in accidental access more services than intended like DeviceCheck or APNS.
Other than using separate keys for MusicKit and other services, is there a way to limit the generated JWT to only the Apple Music API (https://api.music.apple.com/v1/*) using the JWT payload scope?
Topic:
Developer Tools & Services
SubTopic:
General
Tags:
Apple Music API
MusicKit
App Store Connect API
Hello,
I've encountered unexpected behavior related to version information in our app logs, and I'd like to ask for some advice.
We reviewed logs collected from a user running our app (currently available on the App Store). The logs are designed to include both the build number and the app version.
Based on the build number in the logs, we believe the installed app version on the user's device is 1.0.3.
However, the app version recorded in the logs is 1.1.5, which is the latest version currently available on the App Store.
In our project, we set the app version using the MARKETING_VERSION environment variable.
This value is configured via XcodeGen, and we define it in a YAML file.
Under normal circumstances, the value defined in the YAML file (MARKETING_VERSION = 1.0.3) should be embedded in the app and reflected in the logs. But in this case, the version from the current App Store release (1.1.5) appears instead, which was unexpected.
We'd like to know what might cause this behavior, and if there are any known factors that could lead to this.
Also, is it possible that MARKETING_VERSION might somehow dynamically reflect the version currently available on the App Store?
YAML:
info.plist:
Recently a bunch of folks have asked about why a specific symbol is being referenced by their app. This is my attempt to address that question.
If you have questions or comments, please start a new thread. Tag it with Linker so that I see it.
Share and Enjoy
—
Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"
Determining Why a Symbol is Referenced
In some situations you might want to know why a symbol is referenced by your app. For example:
You might be working with a security auditing tool that flags uses of malloc.
You might be creating a privacy manifest and want to track down where your app is calling stat.
This post is my attempt at explaining a general process for tracking down the origin of these symbol references. This process works from ‘below’. That is, it works ‘up’ from you app’s binary rather than ‘down’ from your app’s source code. That’s important because:
It might be hard to track down all of your source code, especially if you’re using one or more package management systems.
If your app has a binary dependency on a static library, dynamic library, or framework, you might not have access to that library’s source code.
IMPORTANT This post assumes the terminology from An Apple Library Primer. Read that before continuing here.
The general outline of this process is:
Find all Mach-O images.
Find the Mach-O image that references the symbol.
Find the object files (.o) used to make that Mach-O.
Find the object file that references the symbol.
Find the code within that object file.
Those last few steps require some gnarly low-level Mach-O knowledge. If you’re looking for an easier path, try using the approach described in the A higher-level alternative section as a replacement for steps 3 through 5.
This post assumes that you’re using Xcode. If you’re using third-party tools that are based on Apple tools, and specifically Apple’s linker, you should be able to adapt this process to your tooling. If you’re using a third-party tool that has its own linker, you’ll need to ask for help via your tool’s support channel.
Find all Mach-O images
On Apple platforms an app consists of a number of Mach-O images. Every app has a main executable. The app may also embed dynamic libraries or frameworks. The app may also embed app extensions or system extensions, each of which have their own executable. And a Mac app might have embedded bundles, helper tools, XPC services, agents, daemons, and so on.
To find all the Mach-O images in your app, combine the find and file tools. For example:
% find "Apple Configurator.app" -print0 | xargs -0 file | grep Mach-O
Apple Configurator.app/Contents/MacOS/Apple Configurator: Mach-O universal binary with 2 architectures: [x86_64:Mach-O 64-bit executable x86_64] [arm64]
…
Apple Configurator.app/Contents/MacOS/cfgutil: Mach-O universal binary with 2 architectures: [x86_64:Mach-O 64-bit executable x86_64] [arm64:Mach-O 64-bit executable arm64]
…
Apple Configurator.app/Contents/Extensions/ConfiguratorIntents.appex/Contents/MacOS/ConfiguratorIntents: Mach-O universal binary with 2 architectures: [x86_64:Mach-O 64-bit executable x86_64] [arm64:Mach-O 64-bit executable arm64]
…
Apple Configurator.app/Contents/Frameworks/ConfigurationUtilityKit.framework/Versions/A/ConfigurationUtilityKit: Mach-O universal binary with 2 architectures: [x86_64:Mach-O 64-bit dynamically linked shared library x86_64] [arm64]
…
This shows that Apple Configurator has a main executable (Apple Configurator), a helper tool (cfgutil), an app extension (ConfiguratorIntents), a framework (ConfigurationUtilityKit), and many more.
This output is quite unwieldy. For nicer output, create and use a shell script like this:
% cat FindMachO.sh
#! /bin/sh
# Passing `-0` to `find` causes it to emit a NUL delimited after the
# file name and the `:`. Sadly, macOS `cut` doesn’t support a nul
# delimiter so we use `tr` to convert that to a DLE (0x01) and `cut` on
# that.
#
# Weirdly, `find` only inserts the NUL on the primary line, not the
# per-architecture Mach-O lines. We use that to our advantage, filtering
# out the per-architecture noise by only passing through lines
# containing a DLE.
find "$@" -type f -print0 \
| xargs -0 file -0 \
| grep -a Mach-O \
| tr '\0' '\1' \
| grep -a $(printf '\1') \
| cut -d $(printf '\1') -f 1
Find the Mach-O image that references the symbol
Once you have a list of Mach-O images, use nm to find the one that references the symbol. The rest of this post investigate a test app, WaffleVarnishORama, that’s written in Swift but uses waffle management functionality from the libWaffleCore.a static library. The goal is to find the code that calls calloc.
This app has a single Mach-O image:
% FindMachO.sh "WaffleVarnishORama.app"
WaffleVarnishORama.app/WaffleVarnishORama
Use nm to confirm that it references calloc:
% nm "WaffleVarnishORama.app/WaffleVarnishORama" | grep "calloc"
U _calloc
The _calloc symbol has a leading underscore because it’s a C symbol. This convention dates from the dawn of Unix, where the underscore distinguish C symbols from assembly language symbols.
The U prefix indicates that the symbol is undefined, that is, the Mach-O images is importing the symbol. If the symbol name is prefixed by a hex number and some other character, like T or t, that means that the library includes an implementation of calloc. That’s weird, but certainly possible. OTOH, if you see this then you know this Mach-O image isn’t importing calloc.
IMPORTANT If this Mach-O isn’t something that you build — that is, you get this Mach-O image as a binary from another developer — you won’t be able to follow the rest of this process. Instead, ask for help via that library’s support channel.
Find the object files used to make that Mach-O image
The next step is to track down which .o file includes the reference to calloc. Do this by generating a link map. A link map is an old school linker feature that records the location, size, and origin of every symbol added to the linker’s output.
To generate a link map, enable the Write Link Map File build setting. By default this puts the link map into a text (.txt) file within the derived data directory. To find the exact path, look at the Link step in the build log. If you want to customise this, use the Path to Link Map File build setting.
A link map has three parts:
A simple header
A list of object files used to build the Mach-O image
A list of sections and their symbols
In our case the link map looks like this:
# Path: …/WaffleVarnishORama.app/WaffleVarnishORama
# Arch: arm64
# Object files:
[ 0] linker synthesized
[ 1] objc-file
[ 2] …/AppDelegate.o
[ 3] …/MainViewController.o
[ 4] …/libWaffleCore.a[2](WaffleCore.o)
[ 5] …/Foundation.framework/Foundation.tbd
…
# Sections:
# Address Size Segment Section
0x100008000 0x00001AB8 __TEXT __text
…
The list of object files contains:
An object file for each of our app’s source files — That’s AppDelegate.o and MainViewController.o in this example.
A list of static libraries — Here that’s just libWaffleCore.a.
A list of dynamic libraries — These might be stub libraries (.tbd), dynamic libraries (.dylib), or frameworks (.framework).
Focus on the object files and static libraries. The list of dynamic libraries is irrelevant because each of those is its own Mach-O image.
Find the object file that references the symbol
Once you have list of object files and static libraries, use nm to each one for the calloc symbol:
% nm "…/AppDelegate.o" | grep calloc
% nm "…/MainViewController.o" | grep calloc
% nm "…/libWaffleCore.a" | grep calloc
U _calloc
This indicates that only libWaffleCore.a references the calloc symbol, so let’s focus on that.
Note As in the Mach-O case, the U prefix indicates that the symbol is undefined, that is, the object file is importing the symbol.
Find the code within that object file
To find the code within the object file that references the symbol, use the objdump tool. That tool takes an object file as input, but in this example we have a static library. That’s an archive containing one or more object files. So, the first step is to unpack that archive:
% mkdir "libWaffleCore-objects"
% cd "libWaffleCore-objects"
% ar -x "…/libWaffleCore.a"
% ls -lh
total 24
-rw-r--r-- 1 quinn staff 4.1K 8 May 11:24 WaffleCore.o
-rw-r--r-- 1 quinn staff 56B 8 May 11:24 __.SYMDEF SORTED
There’s only a single object file in that library, which makes things easy. If there were a multiple, run the following process over each one independently.
To find the code that references a symbol, run objdump with the -S and -r options:
% xcrun objdump -S -r "WaffleCore.o"
…
; extern WaffleRef newWaffle(void) {
0: d10083ff sub sp, sp, #32
4: a9017bfd stp x29, x30, [sp, #16]
8: 910043fd add x29, sp, #16
c: d2800020 mov x0, #1
10: d2800081 mov x1, #4
; Waffle * result = calloc(1, sizeof(Waffle));
14: 94000000 bl 0x14 <ltmp0+0x14>
0000000000000014: ARM64_RELOC_BRANCH26 _calloc
…
Note the ARM64_RELOC_BRANCH26 line. This tells you that the instruction before that — the bl at offset 0x14 — references the _calloc symbol.
IMPORTANT The ARM64_RELOC_BRANCH26 relocation is specific to the bl instruction in 64-bit Arm code. You’ll see other relocations for other instructions. And the Intel architecture has a whole different set of relocations. So, when searching this output don’t look for ARM64_RELOC_BRANCH26 specifically, but rather any relocation that references _calloc.
In this case we’ve built the object file from source code, so WaffleCore.o contains debug symbols. That allows objdump include information about the source code context. From that, we can easily see that calloc is referenced by our newWaffle function.
To see what happens when you don’t have debug symbols, create an new object file with them stripped out:
% cp "WaffleCore.o" "WaffleCore-stripped.o"
% strip -x -S "WaffleCore-stripped.o"
Then repeat the objdump command:
% xcrun objdump -S -r "WaffleCore-stripped.o"
…
0000000000000000 <_newWaffle>:
0: d10083ff sub sp, sp, #32
4: a9017bfd stp x29, x30, [sp, #16]
8: 910043fd add x29, sp, #16
c: d2800020 mov x0, #1
10: d2800081 mov x1, #4
14: 94000000 bl 0x14 <_newWaffle+0x14>
0000000000000014: ARM64_RELOC_BRANCH26 _calloc
…
While this isn’t as nice as the previous output, you can still see that newWaffle is calling calloc.
A higher-level alternative
Grovelling through Mach-O object files is quite tricky. Fortunately there’s an easier approach: Use the -why_live option to ask the linker why it included a reference to the symbol. To continue the above example, I set the Other Linker Flags build setting to -Xlinker / -why_live / -Xlinker / _calloc and this is what I saw in the build transcript:
_calloc from /usr/lib/system/libsystem_malloc.dylib
_newWaffle from …/libWaffleCore.a[2](WaffleCore.o)
_$s18WaffleVarnishORama18MainViewControllerC05tableE0_14didSelectRowAtySo07UITableE0C_10Foundation9IndexPathVtFTf4dnn_n from …/MainViewController.o
_$s18WaffleVarnishORama18MainViewControllerC05tableE0_14didSelectRowAtySo07UITableE0C_10Foundation9IndexPathVtF from …/MainViewController.o
Demangling reveals a call chain like this:
calloc
newWaffle
WaffleVarnishORama.MainViewController.tableView(_:didSelectRowAt:)
WaffleVarnishORama.MainViewController.tableView(_:didSelectRowAt:)
and that should be enough to kick start your investigation.
IMPORTANT The -why_live option only works if you dead strip your Mach-O image. This is the default for the Release build configuration, so use that for this test.
Revision History
2025-07-18 Added the A higher-level alternative section.
2024-05-08 First posted.
I am developing an iOS in-app SDK for collecting code coverage data. The SDK writes coverage data to a specified file by calling __llvm_profile_set_filename and __llvm_profile_write_file. This implementation worked correctly until I switched to Xcode 26.0 to build my project. Now, when __llvm_profile_write_file() is executed, it crashes with the following error stack. Can anyone provide any assistance?
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Subtype: KERN_INVALID_ADDRESS at 0x0000000000000001
Exception Codes: 0x0000000000000001, 0x0000000000000001
Termination Reason: Namespace SIGNAL, Code 11, Segmentation fault: 11
Terminating Process: exc handler [454]
Thread 96 name: Dispatch queue: com.test-coverage.processing
Thread 96: Crashed:
0 Demo 0x122602ea8 initializeValueProfRuntimeRecord (in Demo) (InstrProfilingValue.c:351)
1 Demo 0x00000001226064c0 writeOneValueProfData (in Demo) (InstrProfilingWriter.c:153)
2 Demo 0x0000000122606308 writeValueProfData (in Demo) (InstrProfilingWriter.c:234)
3 Demo 0x00000001226060d0 lprofWriteDataImpl (in Demo) (InstrProfilingWriter.c:401)
4 Demo 0x0000000122605d98 lprofWriteData (in Demo) (InstrProfilingWriter.c:261)
5 Demo 0x0000000122604804 writeFile (in Demo) (InstrProfilingFile.c:536)
6 Demo 0x122604664 __llvm_profile_write_file_alias + 228
7 Demo 0x000000011c6dd108 -[BDTestCoverage p_dumpMainCoverageInfoWithCustomKey:] (in Demo) (TestCoverage.m:995)
8 Demo 0x000000011c6dcef8 -[BDTestCoverage p_dumpAllCoverageProfileWithCustomKey:] (in Demo) (TestCoverage.m:970)
I am running into an issue where when layers are grouped, the icon is not shown as it does within the preview in the Icon Composer app
Is this a bug or is it some setting within the group/app?
In our Unity App for iOS build, when we opened the PDF from the app, it is automatically opening in landspace mode instead of portrait. In the android and windows apps, we are able to open in the portrait mode. We tried to make the changes in the project settings but it did not change.
Any way in which we can acheive this would be helpful for us.
We're facing critical stability issues with a Xamarin-based iOS warehouse management app and need expert validation of our crash log analysis.
We’re seeing recurring issues related to:
Auto Layout Threading Violations
Memory Pressure Terminations
CPU Resource Usage Violations
These are causing app crashes and performance degradation in production. We've attached representative crash logs to this post.
Technical Validation Questions:
Do the crash logs point to app-level defects (e.g., threading/memory management), or could user behavior be a contributing factor?
Is ~1.8GB memory usage acceptable for enterprise apps on iOS, or does it breach platform best practices?
Do the threading violations suggest a fundamental architectural or concurrency design flaw in the codebase?
Would you classify these as enterprise-grade stability concerns requiring immediate architectural refactoring?
Do the memory logs indicate potential leaks, or are the spikes consistent with expected usage patterns under load?
Could resolving the threading violation eliminate or reduce the memory and CPU issues (i.e., a cascading failure)?
Are these issues rooted in Xamarin framework limitations, or do they point more toward app-specific implementation problems?
Documentation & UX Questions:
What Apple-recommended solutions exist for these specific issues? (e.g., memory management, thread safety, layout handling)
From your experience, how would these issues manifest for users? (e.g., crashes, slow performance, logout events, unresponsive UI, etc.
JetsamEvent-2025-05-27-123434_REDACTED.ips
)
WarehouseApp.iOS.cpu_resource-2025-05-30-142737_REDACTED.ips
WarehouseApp.iOS-2025-05-27-105134_REDACTED.ips
Any insights, analysis, or references would be incredibly helpful.
Thanks in advance!
Topic:
Developer Tools & Services
SubTopic:
General
On iOS 18, when XCUITest encounters an "Application has not loaded accessibility" error after the 60 second timeout, it performs an undocumented auto-recovery ("Setting up automation session") instead of halting the test as documented. This leaves the XCUITest framework in a corrupted state, causing subsequent tests in the same session to fail with unexpected behavior.
Expected Behavior (per Apple documentation):
Any failure in the launch sequence will be reported as a test failure and the test will be halted at that point.
Actual Behavior:
XCUITest waits 60 seconds for accessibility to load
Logs "Application has not loaded accessibility" error
Instead of halting, performs "Setting up automation session" (auto-recovery)
Test continues with corrupted framework state
Subsequent tests in the same session fail with phantom element queries
Steps
Run XCUITest suite on a real iOS 18 device
Have an app with moderately heavy initialization (e.g., synchronous network operations during bootstrap)
Observe intermittent "accessibility not loaded" errors
When error occurs, subsequent tests fail with unexpected behavior
Test Logs Evidence
First test (accessibility failure + recovery):
t = 11.11s Wait for accessibility to load
t = 71.14s Capturing diagnostic spindump
t = 76.24s Assertion Failure: Application 'com.example.app' has not loaded accessibility
t = 76.26s Setting up automation session ← Undocumented recovery
t = 77.29s Tear Down
Second test (corrupted state):
t = 35.01s Tap "signin-button"
t = 35.55s Waiting for "bannerButtonStackFirstItem" ← Query NOT in test code!
t = 40.58s Assertion Failure: Failed to find element
The second test executes element queries that do not exist in its source code, indicating leaked/corrupted state from the previous test's failed recovery.
Note: The tearDown() method terminates the app but cannot reset the internal state of the XCUITest framework itself, so corruption persists across tests.
We are observing this behavior consistently on iOS 18 real devices. We would like to know:
Is this a known issue with XCUITest on iOS 18?
Is anyone experiencing similar "accessibility not loaded" failures followed by auto-recovery?
Is the "Setting up automation session" recovery behavior intentional or a bug?
Is there a recommended workaround to prevent framework state corruption between tests?
I am developing an Augmented Reality (AR) navigation application for the iPad, utilizing the ARCL library to place Points of Interest (POIs) in the real world.
The application's behavior varies significantly based on the device's networking configuration:
Cellular Network (Expected Behavior): On an iPad with a cellular modem, when using the cellular network, all POIs are placed accurately with correct orientation.
Wi-Fi Only (Expected Behavior): On a Wi-Fi-only model (no GPS chip), POI placement is inaccurate, confirming the need for an external GPS receiver for that hardware configuration.
Cellular + Wi-Fi (Anomalous Behavior):
The iPad is a cellular model (equipped with GNSS/GPS).
The device is connected to a Wi-Fi network (enforced via an MDM profile, preventing the user from disabling Wi-Fi).
When actively connected to this specific Wi-Fi network, the AR POIs consistently display with an incorrect orientation and placement, even though the device hardware has a dedicated GPS chip. The placement error strongly suggests that the device's determined location or heading is erroneous. It appears that the active Wi-Fi connection is somehow interfering with or overriding the high-accuracy GNSS/GPS data, leading to a flawed Core Location determination that negatively impacts the ARCL world tracking and anchor placement.
Has anyone experienced a scenario where an active Wi-Fi connection on a cellular iPad model causes Core Location to prioritize less accurate location data (potentially Wi-Fi-based location services) over the device's built-in GNSS/GPS, resulting in severe orientation errors? We observed that on Apple map(native application) as well it is showing wrong location and orientation when it is connected to WiFi
I have a project inside the project structure. I have around 300 unit tests in the project.
I see that for some of the subprojects, the coverage numbers show up correctly, but for other subprojects and the main project, the coverage number shows zero, even though the tests are running successfully.
The log I get is:
Aggregation tool emitted warnings:
warning: /Users/ABC/Library/Developer/Xcode/DerivedData/projectABC-hfzmkbdgpiswoxfvvnvhrafaiqyb/Build/ProfileData/A8EEC1FB-1699-4C29-A88C-D3DDA226DBC0/0A416494-A393-4319-AA47-502D72084C9C-43351.profraw: raw profile version mismatch: Profile uses raw profile format version = 8; expected version = 10
PLEASE update this tool to the version in the raw profile, or regenerate the raw profile with the expected version.
I only have one Xcode (26.0.1) on my machine. I tried cleaning the derived data, the cleaning project, and rerunning the tests, but it hasn't helped.
Please help me get the coverage number back. Thank you.