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“xcode github”

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Reply to Need MetricKit Implementation details for MacOS background Application, mainly for
Also one more point, when i integrated metric Kit and used Xcode to simulate MetricKit payloads, i was getting the callback i.e func didReceive(_ payloads: [MXMetricPayload]) Main issue was that when i launched my app with changes and waited for more than 24 hours, but i did not get any callback, so wanted to know if it works on background apps or not? Also does it work on MacOS or not? Could u pls help to answer it
Mar ’26
About Customizing Xcode Project Navigator UI
Since I have downloaded latest Xcode version I am having Project Navigator in the Menu Style UI and not in the Tab based UI, the one earlier. Also, I am not able to find any options to change Project Navigator style. Please provide user the option to change UI to either Menu based or Tab based Project Navigator UI ( Projects, Source Control, Bookmark, find etc )
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259
Mar ’26
Are there known issues with aggressive optimization (-O) affecting third-party libraries?
We are encountering an issue in an iOS application where functionality works correctly in Debug builds but fails in Release builds distributed via TestFlight. Details Debug (No Optimization -Onone): Works correctly Release (Optimize for Speed -O): Fails Release with -Onone: Works, but app size nearly doubles Context The issue is related to integration with the Microsoft ONNX runtime library. It appears that the Swift/Clang compiler is aggressively optimizing certain parts of the code in Release builds, possibly removing or altering required logic. Observations The issue started appearing with recent iOS/Xcode updates. No code changes affecting this logic were made recently. Behavior strongly suggests optimization-related side effects. Questions Are there known issues with aggressive optimization (-O) affecting third-party libraries? Are there recommended flags to selectively disable optimization for specific modules or functions? Any tools or diagnostics to identify what is being optimized out? Tempo
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220
Mar ’26
Reply to Background Assets - Apple Hosted - iOS26
Hello, @andy_nash, @StonedStudio, @tom_krikorian, @Dokug, and @zepsec! I’m happy to report that this issue is now resolved in the OS 26.5 beta 1 simulators that we released today with Xcode 26.5 beta 1. If you still see crashes or errors that mention a “team ID” after updating to the OS 26.5 beta 1 simulators, then please file a new feedback report and reply to this thread with the feedback ID. Note that there’s still a separate known issue that prevents the URL override from working in simulator environments. I’ll post again in this thread when that separate issue is fixed. Thanks!
Mar ’26
Reply to Xcode 26.4 rc
I'm seeing the same issue in Xcode 26.4 release. Failed to authenticate. API Error: 401 {type:error,error:{type:authentication_error,message:OAuth token has expired. Please obtain a new token or refresh your existing token.},request_id:req_011CZaDXn4KLC1KJ3SsLdBwC} This is happening for Claude Agent within Xcode and the only way I can fix it is to log out of Claude and then log back in. Very frustrating.
Mar ’26
Reply to Different app behavior when running on device from Xcode
Thank you @Tomato and @DTS Engineer ! The purpose of my app is to provide a notification mechanism when there are drastic air quality changes. To accomplish this, I have an async function that makes a GET request to an air quality sensor (using UrlSession), decode the payload, and then do comparisons with previous readings. If the readings have changed drastically, an UNMutableNotificationContent() is scheduled. Currently, my async function is called from within a repeating scheduled timer so that I can poll my sensor every minute: Timer.scheduledTimer(withTimeInterval: 1.0, repeats: true) { _ in timerVal -= 1 if timerVal == 0 { timerVal = startVal getAQI() } } This all works just fine (including when the app is in the background) ONLY when I run the app from Build and Run in Xcode on my dev iPhone as the destination. I've left the app running this way for hours in the background and with the phone locked and it works great! However, when I try to run the app purely from the app shortcut on my iPhone
Topic: Community SubTopic: Apple Developers Tags:
Mar ’26
Simulator fails to boot
Im working on my laptop with Mac OS 15.7.5 and Im using Xcode 26.0.1 and Im trying to simulate the code I've written. It only allows me to simulate on iPhone 16e but it never finishes loading, I also tried using my personal iPhone as a simulator but that doesn't work either. Could it possibly be my storage on why the simulators don't work?
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99
Mar ’26
After loading my custom model - unsupportedTokenizer error
In Oct25, using mlx_lm.lora I created an adapter and a fused model uploaded to Huggingface. I was able to incorporate this model into my SwiftUI app using the mlx package. MLX-libraries 2.25.8. My base LLM was mlx-community/Mistral-7B-Instruct-v0.3-4bit. Looking at LLMModelFactory.swift the current version 2.29.1 the only changes are the addition of a few models. The earlier model was called: pharmpk/pk-mistral-7b-v0.3-4bit The new model is called: pharmpk/pk-mistral-2026-03-29 The base model (mlx-community/Mistral-7B-Instruct-v0.3-4bit.) must still be available. Could the error 'unsupportedTokenizer' be related to changes in the mlx package? I noticed mention of splitting the package into two parts but don't see anything at github. Feeling rather lost. Does anone have any thoguths and/or suggestions. Thanks, David
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445
Mar ’26
CoreML MLE5ProgramLibrary AOT recompilation hangs/crashes on iOS 26.4 — C++ exception in espresso IR compiler bypasses Swift error handling
Area: CoreML / Machine Learning Describe the issue: On iOS 26.4, calling MLModel(contentsOf:configuration:) to load an .mlpackage model hangs indefinitely and eventually kills the app via watchdog. The same model loads and runs inference successfully in under 1 second on iOS 26.3.1. The hang occurs inside eort_eo_compiler_compile_from_ir_program (espresso) during on-device AOT recompilation triggered by MLE5ProgramLibraryOnDeviceAOTCompilationImpl createProgramLibraryHandleWithRespecialization:error:. A C++ exception (__cxa_throw) is thrown inside libBNNS.dylib during the exception unwind, which then hangs inside __cxxabiv1::dyn_cast_slow and __class_type_info::search_below_dst. Swift's try/catch does not catch this — the exception originates in C++ and the process hangs rather than terminating cleanly. Setting config.computeUnits = .cpuOnly does not resolve the issue. MLE5ProgramLibrary initialises as shared infrastructure regardless of compute units. Steps to reproduce: Create an app with an .mlpackage Core
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721
Mar ’26
Different app behavior when running on device from Xcode
I have an app I am working on that makes a REST call, updates the UI with the info, and sends a notification. When I run Build and Run my app from Xcode using my iPhone as the destination, it works exactly as I want it to - my REST calls and notifications continue to work when the app is in the background. However, when I run my app that has been installed on my iPhone from the Xcode build/run directly (without Xcode in the picture), it does NOT behave correctly and only works when my app is in the foreground. What am I missing?
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435
Mar ’26
Reply to Installation of XCode CLT on Tahoe 26.1
Thanks for the post, I don’t see what are you selecting to install. Download Directly from the Apple Developer Portal is the recommended way or better use the Apple Store for the release version. Go to the Apple Developer Downloads page. Sometimes the GUI fails, but forcing the macOS software update utility through the terminal works. If Xcode is a beta or internal build, the xcode-select --install command will almost always fail because Apple does not host beta Command Line Tools on the public production update servers. I would recommend to install the Xcode you want from the developer portal if beta or RC and the App Store if you want the latest release version. Albert 
  Worldwide Developer Relations.
Mar ’26
Sporadic crash in xzm_main_malloc_zone_init_range_groups when spawning large binaries (macOS 26.3.1)
We're seeing a sporadic crash (~2-3% of spawns) when launching a large Mach-O binary via posix_spawn(). The crash happens inside libsystem_malloc.dylib during __malloc_init, before any application code runs. The process never reaches main(). Environment: macOS 26.3.1 (25D2128), Apple Silicon (ARM64) Crash signature BUG IN LIBMALLOC: pointer range initial reservation failed, Abort Cause 3 #0 libsystem_malloc.dylib: xzm_main_malloc_zone_init_range_groups.cold.1 #1 libsystem_malloc.dylib: xzm_main_malloc_zone_init_range_groups #2 libsystem_malloc.dylib: xzm_main_malloc_zone_create #3 libsystem_malloc.dylib: __malloc_init #4 libSystem.B.dylib: libSystem_initializer #5 dyld: dyld4::Loader::findAndRunAllInitializers The binary It's a Chromium component-build test binary (browser_tests): ~1.5 GiB on disk, 5.54 GiB total VA footprint (__TEXT 517 MiB, __LINKEDIT 1.04 GiB, __PAGEZERO 4 GiB) Links 527 dylibs via @rpath All images span ~16.4 GiB of VA when loaded A simple loop that spawns this binary 200 times v
3
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155
Mar ’26
Reply to Need MetricKit Implementation details for MacOS background Application, mainly for
Also one more point, when i integrated metric Kit and used Xcode to simulate MetricKit payloads, i was getting the callback i.e func didReceive(_ payloads: [MXMetricPayload]) Main issue was that when i launched my app with changes and waited for more than 24 hours, but i did not get any callback, so wanted to know if it works on background apps or not? Also does it work on MacOS or not? Could u pls help to answer it
Replies
Boosts
Views
Activity
Mar ’26
About Customizing Xcode Project Navigator UI
Since I have downloaded latest Xcode version I am having Project Navigator in the Menu Style UI and not in the Tab based UI, the one earlier. Also, I am not able to find any options to change Project Navigator style. Please provide user the option to change UI to either Menu based or Tab based Project Navigator UI ( Projects, Source Control, Bookmark, find etc )
Replies
2
Boosts
0
Views
259
Activity
Mar ’26
Are there known issues with aggressive optimization (-O) affecting third-party libraries?
We are encountering an issue in an iOS application where functionality works correctly in Debug builds but fails in Release builds distributed via TestFlight. Details Debug (No Optimization -Onone): Works correctly Release (Optimize for Speed -O): Fails Release with -Onone: Works, but app size nearly doubles Context The issue is related to integration with the Microsoft ONNX runtime library. It appears that the Swift/Clang compiler is aggressively optimizing certain parts of the code in Release builds, possibly removing or altering required logic. Observations The issue started appearing with recent iOS/Xcode updates. No code changes affecting this logic were made recently. Behavior strongly suggests optimization-related side effects. Questions Are there known issues with aggressive optimization (-O) affecting third-party libraries? Are there recommended flags to selectively disable optimization for specific modules or functions? Any tools or diagnostics to identify what is being optimized out? Tempo
Replies
2
Boosts
0
Views
220
Activity
Mar ’26
Reply to Background Assets - Apple Hosted - iOS26
Hello, @andy_nash, @StonedStudio, @tom_krikorian, @Dokug, and @zepsec! I’m happy to report that this issue is now resolved in the OS 26.5 beta 1 simulators that we released today with Xcode 26.5 beta 1. If you still see crashes or errors that mention a “team ID” after updating to the OS 26.5 beta 1 simulators, then please file a new feedback report and reply to this thread with the feedback ID. Note that there’s still a separate known issue that prevents the URL override from working in simulator environments. I’ll post again in this thread when that separate issue is fixed. Thanks!
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Views
Activity
Mar ’26
Reply to Xcode 26.4 rc
I'm seeing the same issue in Xcode 26.4 release. Failed to authenticate. API Error: 401 {type:error,error:{type:authentication_error,message:OAuth token has expired. Please obtain a new token or refresh your existing token.},request_id:req_011CZaDXn4KLC1KJ3SsLdBwC} This is happening for Claude Agent within Xcode and the only way I can fix it is to log out of Claude and then log back in. Very frustrating.
Replies
Boosts
Views
Activity
Mar ’26
Reply to Different app behavior when running on device from Xcode
Thank you @Tomato and @DTS Engineer ! The purpose of my app is to provide a notification mechanism when there are drastic air quality changes. To accomplish this, I have an async function that makes a GET request to an air quality sensor (using UrlSession), decode the payload, and then do comparisons with previous readings. If the readings have changed drastically, an UNMutableNotificationContent() is scheduled. Currently, my async function is called from within a repeating scheduled timer so that I can poll my sensor every minute: Timer.scheduledTimer(withTimeInterval: 1.0, repeats: true) { _ in timerVal -= 1 if timerVal == 0 { timerVal = startVal getAQI() } } This all works just fine (including when the app is in the background) ONLY when I run the app from Build and Run in Xcode on my dev iPhone as the destination. I've left the app running this way for hours in the background and with the phone locked and it works great! However, when I try to run the app purely from the app shortcut on my iPhone
Topic: Community SubTopic: Apple Developers Tags:
Replies
Boosts
Views
Activity
Mar ’26
Simulator fails to boot
Im working on my laptop with Mac OS 15.7.5 and Im using Xcode 26.0.1 and Im trying to simulate the code I've written. It only allows me to simulate on iPhone 16e but it never finishes loading, I also tried using my personal iPhone as a simulator but that doesn't work either. Could it possibly be my storage on why the simulators don't work?
Replies
0
Boosts
0
Views
99
Activity
Mar ’26
Reply to Installation of XCode CLT on Tahoe 26.1
It turned out to be a Mac OS version compatibility issue. I needed to upgrade to 26.2 or higher to install XCode CLT
Replies
Boosts
Views
Activity
Mar ’26
After loading my custom model - unsupportedTokenizer error
In Oct25, using mlx_lm.lora I created an adapter and a fused model uploaded to Huggingface. I was able to incorporate this model into my SwiftUI app using the mlx package. MLX-libraries 2.25.8. My base LLM was mlx-community/Mistral-7B-Instruct-v0.3-4bit. Looking at LLMModelFactory.swift the current version 2.29.1 the only changes are the addition of a few models. The earlier model was called: pharmpk/pk-mistral-7b-v0.3-4bit The new model is called: pharmpk/pk-mistral-2026-03-29 The base model (mlx-community/Mistral-7B-Instruct-v0.3-4bit.) must still be available. Could the error 'unsupportedTokenizer' be related to changes in the mlx package? I noticed mention of splitting the package into two parts but don't see anything at github. Feeling rather lost. Does anone have any thoguths and/or suggestions. Thanks, David
Replies
3
Boosts
0
Views
445
Activity
Mar ’26
CoreML MLE5ProgramLibrary AOT recompilation hangs/crashes on iOS 26.4 — C++ exception in espresso IR compiler bypasses Swift error handling
Area: CoreML / Machine Learning Describe the issue: On iOS 26.4, calling MLModel(contentsOf:configuration:) to load an .mlpackage model hangs indefinitely and eventually kills the app via watchdog. The same model loads and runs inference successfully in under 1 second on iOS 26.3.1. The hang occurs inside eort_eo_compiler_compile_from_ir_program (espresso) during on-device AOT recompilation triggered by MLE5ProgramLibraryOnDeviceAOTCompilationImpl createProgramLibraryHandleWithRespecialization:error:. A C++ exception (__cxa_throw) is thrown inside libBNNS.dylib during the exception unwind, which then hangs inside __cxxabiv1::dyn_cast_slow and __class_type_info::search_below_dst. Swift's try/catch does not catch this — the exception originates in C++ and the process hangs rather than terminating cleanly. Setting config.computeUnits = .cpuOnly does not resolve the issue. MLE5ProgramLibrary initialises as shared infrastructure regardless of compute units. Steps to reproduce: Create an app with an .mlpackage Core
Replies
4
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0
Views
721
Activity
Mar ’26
Reply to iCloud Sync not working with iPhone, works fine for Mac.
I can confirm my App works again (iPad 26.5 beta) .✅ ⁇ I cannot confirm the apple example program works as I've run out of devices (and I'm not sure if CkSyncEngine behaves properly with sandbox users or Xcode simulation)
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Mar ’26
Reply to Different app behavior when running on device from Xcode
Clarification - when not running through Xcode, my app stops making my REST calls/notifications, which are on run repeatedly using a Timer Timer.scheduledTimer(withTimeInterval: 1.0, repeats: true) { _ in
Topic: Community SubTopic: Apple Developers Tags:
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Views
Activity
Mar ’26
Different app behavior when running on device from Xcode
I have an app I am working on that makes a REST call, updates the UI with the info, and sends a notification. When I run Build and Run my app from Xcode using my iPhone as the destination, it works exactly as I want it to - my REST calls and notifications continue to work when the app is in the background. However, when I run my app that has been installed on my iPhone from the Xcode build/run directly (without Xcode in the picture), it does NOT behave correctly and only works when my app is in the foreground. What am I missing?
Replies
6
Boosts
0
Views
435
Activity
Mar ’26
Reply to Installation of XCode CLT on Tahoe 26.1
Thanks for the post, I don’t see what are you selecting to install. Download Directly from the Apple Developer Portal is the recommended way or better use the Apple Store for the release version. Go to the Apple Developer Downloads page. Sometimes the GUI fails, but forcing the macOS software update utility through the terminal works. If Xcode is a beta or internal build, the xcode-select --install command will almost always fail because Apple does not host beta Command Line Tools on the public production update servers. I would recommend to install the Xcode you want from the developer portal if beta or RC and the App Store if you want the latest release version. Albert 
  Worldwide Developer Relations.
Replies
Boosts
Views
Activity
Mar ’26
Sporadic crash in xzm_main_malloc_zone_init_range_groups when spawning large binaries (macOS 26.3.1)
We're seeing a sporadic crash (~2-3% of spawns) when launching a large Mach-O binary via posix_spawn(). The crash happens inside libsystem_malloc.dylib during __malloc_init, before any application code runs. The process never reaches main(). Environment: macOS 26.3.1 (25D2128), Apple Silicon (ARM64) Crash signature BUG IN LIBMALLOC: pointer range initial reservation failed, Abort Cause 3 #0 libsystem_malloc.dylib: xzm_main_malloc_zone_init_range_groups.cold.1 #1 libsystem_malloc.dylib: xzm_main_malloc_zone_init_range_groups #2 libsystem_malloc.dylib: xzm_main_malloc_zone_create #3 libsystem_malloc.dylib: __malloc_init #4 libSystem.B.dylib: libSystem_initializer #5 dyld: dyld4::Loader::findAndRunAllInitializers The binary It's a Chromium component-build test binary (browser_tests): ~1.5 GiB on disk, 5.54 GiB total VA footprint (__TEXT 517 MiB, __LINKEDIT 1.04 GiB, __PAGEZERO 4 GiB) Links 527 dylibs via @rpath All images span ~16.4 GiB of VA when loaded A simple loop that spawns this binary 200 times v
Replies
3
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0
Views
155
Activity
Mar ’26