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Static library produced by Xcode 26 causes link error on Xcode 16
When a static library is built with Xcode 26 (with deployment target set to iOS 13) and then linked into an app project compiled with Xcode 16, the build process fails with the following linker error: Undefined symbols for architecture arm64: "_swift_coroFrameAlloc" This occurs even though both the static library and the app project have their deployment targets set to iOS 13.0. The static library works on Xcode 26, but fails to link on Xcode 16. This issue shows up with certain Swift syntax. For example, in my case, using a property getter and setter caused the compiler to emit a reference to _swift_coroFrameAlloc, which in turn triggered the issue. This issue prevents us from distributing pre-built static libraries compiled with Xcode 26 to teammates who are still using Xcode 16. I’ve filed feedback for this issue (FB21130604). Is there any way to work around it? For example, by adding specific Build Settings or something similar? A demo project is available here: https://github.com/Naituw/SwiftLibraryDeploymentTargetIssue The demo project includes: StaticLibraryProject: A simple Swift static library with property getter setter usage AppProject: An iOS app that links against the static library verify_compatibility.sh: An automated script to reproduce the issue Method 1: Manual Build and Verification Open StaticLibraryProject/StaticLibraryProject.xcodeproj in Xcode 26 Build the StaticLibraryProject for iOS device (Release configuration) Locate the built libStaticLibraryProject.a in the build products directory Copy libStaticLibraryProject.a to AppProject/AppProject/ directory Open AppProject/AppProject.xcodeproj in Xcode 16 Build the AppProject for iOS device Method 2: Automated Script Edit verify_compatibility.sh to configure the paths to your Xcode installations: Set XCODE_26_PATH to your Xcode 26 installation path (e.g., /Applications/Xcode.app) Set XCODE_16_PATH to your Xcode 16 installation path (e.g., /Applications/Xcode16.app) Run the script: ./verify_compatibility.sh
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Nov ’25
crash while exectuing __llvm_profile_write_file() in Xcode26.0
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)
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Nov ’25
Apple-hosted managed asset pack not found on macOS
Hi all, I have set up a trivial test project to try Apple-hosted background assets following the instructions in the three articles at https://developer.apple.com/documentation/backgroundassets. When I run the local mock server with xcrun ba-serve and set the URL override in Settings as described in the "Testing asset packs locally" article, I am able to download a test pack on my iOS devices. On the Mac that I use to run the mock server, however, the same call to AssetPackManager.shared.assetPack(withID: "TestAssetPack") that works on iOS always reports The asset pack with the ID “TestAssetPack” couldn’t be looked up: No asset pack with the ID “TestAssetPack” was found. even when not running the mock server, which led me to believe that it may not be hitting it at all. In fact, the macOS app will download asset packs uploaded to App Store Connect even when running the local server and setting the xcrun ba-serve url-override to the exact same string as in Settings on iOS. My initial suspicion was that something is wrong with the URL override, so I have tried all combinations of the Mac's hostname, IP address or "localhost" (with the corresponding SSL certificates) with and without port 443, always prefixing with "https://" for the url-override. All the same. Does anyone have an idea what may be the issue here? My asset pack has the following manifest: { "assetPackID": "TestAssetPack", "downloadPolicy": { "onDemand": {} }, "fileSelectors": [ { "file": "TestAsset.txt" } ], "platforms": [ "iOS", "macOS" ] } I am running v26.1 for macOS, iOS & Xcode. Edit: Just to be clear, my assumption here is that the URL overrides (in Settings on iOS or via ba-serve on macOS) is what should cause the app to hit the mock server. Is that correct or am I missing something?
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Nov ’25
memory leak in dlopen / dlcose, or user error?
Calling dlopen then dlclose causes an increase in the amount of memory used by the program. If I create a loop that calls dlopen / dlclose repeatedly on the same dynamic library, memory usage increases continuously. Is this a bug, or am I using dlopen / dlclose incorrectly? I can reproduce this by modifying the sample code in the Apple Developer docs Creating Dynamic Libraries. If I modify Runtime.c, changing the line void *lib_handle = dlopen(lib_name, RTLD_NOW); to add the infinite loop, as below: void *lib_handle = dlopen(lib_name, RTLD_NOW); for (int ii = 0; ; ++ii) { printf("loop %i\n", ii); int close_err = dlclose(lib_handle); printf("close error: %i\n", close_err); printf("dlopen(%s, RTLD_NOW)\n", lib_name); lib_handle = dlopen(lib_name, RTLD_NOW); } then opening and closing the dynamic library will succeed, but memory usage (as reported by top) will rapidly increase. I'm running on x86_64 macOS 13.6.6. Full code for the modified Runtime.c is attached, the rest of the code is available in the Apple Developer docs. Any suggestions? Many thanks, Chris Runtime.c
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Nov ’25
On Demand Resources as Legacy Technology
I read on this documentation : https://developer.apple.com/help/app-store-connect/reference/app-uploads/on-demand-resources-size-limits that On Demand Resources a legacy technology. Does this mean ODR will be deprecated? If so, when will it officially take effect? Our application is planning to use it, so we need more information to support our decision.
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Nov ’25
How are Assets removed?
Hello, I'm trying to figure out the behavior of AssetPackManager.shared.remove(assetPackWithID: ). I'm working with MapKit tiles and currently working on trying projecting them correctly which involves serving the AssetPack locally, downloading, checking alignment, and then deleting and changing. My question is that remove(assetPackWithID: ) completes successfully and the asset pack is removed. This is confirmed by trying to remove the AssetPack again which throws an error. However, the asset is still appearing on MapKit after the removal. This is a bit odd as this persists not only with force killing, but also restarting the device. Please advise on how to properly remove an AssetPack. Thank you iPhone 15 Pro Max (iOS 26.0.1) iPhone 17 Pro Max (iOS 26.0.1)
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Nov ’25
Need Step-by-Step Instructions for Submitting React Native/Expo App to TestFlight & App Store (Individual Account)
Hello - I’m the Account Holder for an individual Apple Developer Program account. I’m working with freelance junior developers who are building my app in React Native mainly in TypeScript (.tsx) with some JavaScript, with code in GitHub. The app currently runs in Expo Go now. I’ve been directed to this forum for step-by-step guidance. Specifically I need clear, sequential instructions I can give my developers (and what I personally must do on my Mac) so they can produce a properly signed iOS build for TestFlight (internal testing), and Upload that build to App Store Connect and then submit the release to the App Store. Context: This is an individual developer account (not an organization). I am the only person with a Mac. I added them as developers but was told I need to be the one to upload the final build (is this true, and if so, what do they send me to do that, and when they send it to me, can you please tell me exactly what I need to do from there?) I was told about Swift Playground, possible SwiftUI conversion if needed, APK file, and using my Xcode for final submission, but not sure what to make of this that will get it on TestFlight from the current React Native. What I would like to ask for help with is a concise, step-by-step checklist (including exact menu names / commands or tools like EAS Submit, Transporter, or Xcode) of the developers' steps and my admin/account holder steps, so I can hand it to the developers and make sure nothing is missed to get on TestFlight. I’m on a tight timeline, so any clear, detailed guidance would be extremely appreciated. Thank you so much. I have looked everywhere and cannot find a step-by-step!
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Nov ’25
Simulator high CPU usage (CrashReport and MercuryPosterExtension)
Simply opening Simulator app (26.0) causes high CPU usage on macOS Tahoe (26.1). ReportCrash process usage is very high throughout and causes the system to heat up pretty soon. Looking into Console app for the logs found MercuryPosterExtension process is keep on crashing. (Check under Crash Reports) simctl Diagnose https://download.developer.apple.com/OS_X/OS_X_Logs/simctl_Diagnose_Logging_Instructions.pdf Share the Simulator Diagnose report while reporting, Thanks. I have raised a ticket/feedback with Apple. I request all of you to raise one too so this gets fixed soon. Apple Feedback Assistant - FB20985249
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Nov ’25
Feedbacks stay “unread" forever
I have two feedbacks now where I’ve been requested additional info, and provided it, but the feedback still has an “unread” dot, and is still in the “Requests” folder. I’ve asked multiple times to clear this status in one of those feedbacks (FB14888965), but got no response. Not the end of the world as long as the engineers are notified, but iirc the dot would disappear as soon as I replied.
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Nov ’25
Error Message - Rork Publishing in Apple IOS
Hi, I keep getting an error message when I try to publish my App made with Rork into Apple IOS. Message reads "Submission failed: Submission failed. Contact support. Don’t dump it on Rork — it won’t fix this. We still need a human." Any help with this would be appreciated. I am using Microsoft edge and have also used Google Chrome.
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Nov ’25
Apple Support for Xcode error
Hello, We tried calling Apple support who suggested they cannot help and work thru emails and discussion forums to resolve the technical issue we are facing to post our first App in App Store. I have given admin level credential to my son (minor) allowing him to incorporate his Xcode to App Store with his credentials. Apparently, he keeps getting error he does not have enough credentials to do so and we are unable to proceed further. I acknowledge I am not a developer & Apple support team was unable to help, I wonder if there is specific support channel I need to follow to resolve the issue. His App is going to help is Robotics team in upcoming event and we appreciate if someone can kindly point me to right direction to resolve the matter at earliest.
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Nov ’25
Watch App Not available to install
I added an Apple Watch app target for an iOS app. If I install it directly through Xcode it runs, however it seems to be able to communicate with iphone through Watch Connectivity framework and once I close the app it seems to uninstall itself from the watch. When I installed the iphone app frist, the app does not show up on the available apps on the iphone Watch application, what could be the issue ? The iphone app was created using react native through expo. Testing Devices Iphone 13 pro max IOS 26.0.1 --- Apple Watch Series 4 WatchOS 10.6
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Nov ’25
Family Controls entitlement not working on TestFlight (works fine on Xcode build)
I’m developing an app that uses Family Controls to block other apps. I’ve already received approval from Apple for the entitlement, and everything works perfectly when I run the app from Xcode on a physical device. However, when I upload the same build to TestFlight, the app installs and runs, but the Family Controls functionality doesn’t work — it seems like the entitlement isn’t being applied in the TestFlight version. So I’d like to ask: 👉 Do Family Controls entitlements work automatically on TestFlight builds, or is there any additional step required to enable them?
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Nov ’25
UI tests blocked by “bash requesting screen access” popup in Mac OS 15
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.
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Nov ’25