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dlopen problems with debug build, macOS SDK 15, and ASAN
Hello, There seems to be a regression with macOS SDK 15 and dynamically loading libraries if Address Sanitizer is turned on. Seems to only affect Debug builds, and .frameworks. I've also reported this via the Feedback Assistant: FB16513866 Here's a minimal repro, if anyone is interested: https://gist.github.com/peter-esik/6b00432e411be85333e14ae7d953966e I thought I'd post this here, as according to my web searches, this isn't a very well-known bug at this point.
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Feb ’25
Immediate crash of Apple Watch simulator when typing a key
I get a crash in Apple Watch simulator (Series 9 45mm 18.0) as soon as the app launch if I type anything on external keyboard (just hitting command key for instance to capture a screenshot). Same crash on series 7 (45mm, OS 18.1) But app works normally when I use mouse to interact with the app on simulator. App does not crash on real device (Watch 4 OS 10.4.1). Nor does it crash on Series 6 simulator (44 mm OS 17.4). Here are the log I could collect (apparently, they contain sensitive language !!! so I attach as a file.: Attached logs
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385
Mar ’25
How to report Xcode 26 / iOS 26 bugs with Feedback Assistant?
I'm running macOS 15.5. I now have Xcode 26 and I'm testing my iOS app against iOS 26. I've encountered several UIKit / iOS 26 bugs I'd like to report. In Feedback Assistant I choose "Developer Technologies & SDKs". Eventually I get asked "What build does the issue occur on?". The list of choices is: iOS 18.2 Seed 4 iOS 18.1.1 iOS 17.7.2 An earlier iOS build I'm not sure So how to I report this as an iOS 26 beta 1 issue?
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259
Jun ’25
Importing files to Files.app in iOS 26 Simulator
In previous versions of the simulator, it was possible to import files into the Files app by dragging them from the Finder into the Simulator. It appears that in the iOS 26 Simulator, this opens the file in Safari. I've only tried it with .json files so far. The documentation at https://developer.apple.com/documentation/xcode/sharing-data-with-simulator says that the original behaviour should happen: To add files to Simulator, select one or more files in Finder on your Mac, then click the Share button. Select Simulator from the share destination list. Choose the simulated device from the drop-down list. Simulator opens the Files app, and lets you select where to save the files. I'd love to learn if this is intentional behaviour, and if so, what workarounds there might be. I use this pattern quite a lot, as I have a HealthKit app, and I've built a system that allows me to export workouts as JSON files from a real device, that I can then import into a simulator for testing. Edit: I found a workaround. Make a folder in Files.app, then search for it within ~/Library/Developer/CoreSimulator/Devices. Open the folder in Finder, then add any files you want to be available in the Simulator.
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Unstable behavior of xcodebuild -showdestinations
Hi, I am having an issue with xcodebuild -showdestinations command. Steps to reproduce: Create a new iOS application project in Xcode or use an existing one. Navigate to this project in a terminal. Run xcodebuild -project 'your-project-name.xcodeproj' -scheme 'your-scheme' -showdestinations What I expect: All destinations available in the Xcode UI should be listed. What I get: It depends. For new projects, I consistently get only generic platform destinations and my connected physical device. When I run the same command on an older project, I sometimes see all the expected destinations. It seems to be a roughly 50/50 chance between the two outcomes. Is there a way to get consistent results from xcodebuild -showdestinations? What can I do to ensure all destinations are listed reliably? Here is a more detailed log and a screenshot: ❯ xcodebuild -workspace 'WorkoutDiary.xcworkspace' -scheme 'WorkoutDiary' -showdestinations Command line invocation: /Applications/Xcode.app/Contents/Developer/usr/bin/xcodebuild -workspace WorkoutDiary.xcworkspace -scheme WorkoutDiary -showdestinations User defaults from command line: IDEPackageSupportUseBuiltinSCM = YES 2025-06-17 19:13:50.261 xcodebuild[34753:6177985] DVTDeviceOperation: Encountered a build number "" that is incompatible with DVTBuildVersion. 2025-06-17 19:13:50.342 xcodebuild[34753:6177959] [MT] DVTDeviceOperation: Encountered a build number "" that is incompatible with DVTBuildVersion. Resolve Package Graph Resolved source packages: <REDACTED> Available destinations for the "WorkoutDiary" scheme: { platform:macOS, arch:arm64, variant:Designed for [iPad,iPhone], id:<REDACTED>, name:My Mac } { platform:iOS, arch:arm64, id:<REDACTED>, name:<REDACTED> } { platform:iOS, id:dvtdevice-DVTiPhonePlaceholder-iphoneos:placeholder, name:Any iOS Device } { platform:iOS Simulator, id:dvtdevice-DVTiOSDeviceSimulatorPlaceholder-iphonesimulator:placeholder, name:Any iOS Simulator Device } ❯ xcodebuild -workspace 'WorkoutDiary.xcworkspace' -scheme 'WorkoutDiary' -showdestinations Command line invocation: /Applications/Xcode.app/Contents/Developer/usr/bin/xcodebuild -workspace WorkoutDiary.xcworkspace -scheme WorkoutDiary -showdestinations User defaults from command line: IDEPackageSupportUseBuiltinSCM = YES 2025-06-17 19:13:52.393 xcodebuild[34757:6178035] DVTDeviceOperation: Encountered a build number "" that is incompatible with DVTBuildVersion. 2025-06-17 19:13:52.472 xcodebuild[34757:6178020] [MT] DVTDeviceOperation: Encountered a build number "" that is incompatible with DVTBuildVersion. Resolve Package Graph Resolved source packages: <REDACTED> Available destinations for the "WorkoutDiary" scheme: { platform:macOS, arch:arm64, variant:Designed for [iPad,iPhone], id:<REDACTED>, name:My Mac } { platform:iOS, arch:arm64, id:<REDACTED>, name:<REDACTED> } { platform:iOS, id:dvtdevice-DVTiPhonePlaceholder-iphoneos:placeholder, name:Any iOS Device } { platform:iOS Simulator, id:dvtdevice-DVTiOSDeviceSimulatorPlaceholder-iphonesimulator:placeholder, name:Any iOS Simulator Device } { platform:iOS Simulator, id:DBFB9613-0261-4544-908A-335570F3C35F, OS:18.3.1, name:iPhone 11 } { platform:iOS Simulator, id:A48C309C-231A-4197-A295-900F89C94D86, OS:18.3.1, name:iPhone 16 Pro Max }
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207
Jun ’25
Provisioning Profile Does Not Include Required Speech Recognition Entitlement
I am building an iOS app with the App ID: com.echo.eyes.app I have a paid Apple Developer membership and have followed all correct procedures, including: Adding com.apple.developer.speech-recognition manually to the App.entitlements file Setting Info.plist keys for microphone and speech permissions Assigning my Apple Developer Team to the project Setting App/App.entitlements under Code Signing Entitlements Despite all this, Xcode automatic signing fails, and I receive the error: vbnet Copy Edit Provisioning profile 'iOS Team Provisioning Profile: com.echo.eyes.app' doesn't include the com.apple.developer.speech-recognition entitlement. I am unable to add the entitlement via the Capabilities section, and no method I try will allow provisioning to succeed. Please update this App ID to include the required entitlement in the provisioning profile. This issue is preventing all voice recognition functionality. Thank you.
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134
Jun ’25
Trackpad Right-Click (Two-Finger Tap) Support in Linux Guests – macOS Virtualization Framework
Hello, I'm developing a macOS application that uses the Virtualization framework to run Linux virtual machines (specifically Ubuntu and Fedora) on Apple Silicon Macs. I've noticed that while the macOS host properly supports all trackpad gestures, the two-finger tap gesture for right-click does not work within the Linux guest. Only the primary click is recognized. This behavior is consistent across different Linux distributions and desktop environments (GNOME, KDE, etc.). I would like to confirm: Is the macOS Virtualization framework expected to support trackpad gestures such as two-finger tap for right-click within Linux guest VMs? If not currently supported, is there a known workaround to enable right-click functionality for the trackpad in Linux guests? (e.g., configuration changes in the VM, Linux kernel input modules, or framework-level adjustments.) Any insights or suggestions would be greatly appreciated. Thank you!
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May ’25
Gnu Fortran and Mac OS Sequoia
I observed the following problem: A scientific code to perform Reverse Monte Carlo simulations (‘rmcxas’) compiled with the most up to date version of gcc/gfortran and Xcode including command line tools on Mac OS Sequoia 15.4 on a Macbook air with M4 processor generates the following problem upon starting it in a terminal: dyld[10154]: dyld cache '(null)' not loaded: syscall to map cache into shared region failed dyld[10154]: Library not loaded: /usr/lib/libSystem.B.dylib Referenced from: <0144F82E-003C-37A9-A544-9AE6336E549B> /Users/markuswinterer/bin/rmcxas Reason: tried: '/usr/lib/libSystem.B.dylib' (no such file), '/System/Volumes/Preboot/Cryptexes/OS/usr/lib/libSystem.B.dylib' (no such file), '/usr/lib/libSystem.B.dylib' (no such file, no dyld cache), '/usr/local/lib/libSystem.B.dylib' (no such file) zsh: abort rmcxas This occurs only about every 5th time the code is started. Help would be highly appreciated.
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May ’25
Production Issue - MetricKit is not generating daily metric payloads as expected since iOS 18
I'm a big fan of MetricKit. I decided to see how my apps are performing with iOS 18 and well, I'm not getting any metric payloads from those devices. Metric payloads received from my test devices adopting iOS 18 has pretty much bottomed out to zero. Is anyone getting MetricKit MXMetricPayloads from iOS 18 devices? FB15461298 - MetricKit: Production issue / regression with iOS 18 - Significant dropout or metric payloads being generated since 18.0 - nearly no reports To demonstrate the issue, I decided to graph the metric payloads my infrastructure receives for all of my apps across all of my devices over the last 16 months starting with WWDC23 timeframe. This data is grouped by count per month. A trend can easily be seen starting in June 2024 where I started to adopt iOS 18 betas. Zooming in since WWDC24, grouped by week, it is much easier to see the decline. Note, the second screenshot shows data collected from Xcode builds, TestFlight, and App Store. The last data point from today was a manual creation from Xcode's Debug window, so at least that triggering mechanism works and I can confirm all of my code to upload off device works as expected. On the bright side, I guess I will ship this 'payload received over time' feature in my MetricKit payload analyzer app with a scrolling window and group by features that make up these screenshots.
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Oct ’24
The Unity application crashes due to KERN_PROTECTION_FAILURE and GC_clear_stack_inneb why?
Crash dump: `Crashed Thread: 0 tid_103 Dispatch queue: com.apple.main-thread Exception Type: EXC_BAD_ACCESS (SIGILL) Exception Codes: KERN_PROTECTION_FAILURE at 0x000000016d3bfea0 Exception Codes: 0x0000000000000002, 0x000000016d3bfea0 Termination Reason: Namespace SIGNAL, Code 4 Illegal instruction: 4 Terminating Process: Unity [7873] VM Region Info: 0x16d3bfea0 is in 0x169bbc000-0x16d3c0000; bytes after start: 58736288 bytes before end: 351 REGION TYPE START - END [ VSIZE] PRT/MAX SHRMOD REGION DETAIL mapped file 169b00000-169ba8000 [ 672K] rw-/rwx SM=PRV Object_id=4d22156e GAP OF 0x14000 BYTES ---&gt; STACK GUARD 169bbc000-16d3c0000 [ 56.0M] ---/rwx SM=NUL stack guard for thread 0 Stack 16d3c0000-16dbbc000 [ 8176K] rw-/rwx SM=SHM thread 0 Thread 0 Crashed:: tid_103 Dispatch queue: com.apple.main-thread 0 libsystem_platform.dylib 0x1932ee7ac _platform_memset + 108 1 libmonobdwgc-2.0.dylib 0x33977abdc GC_clear_stack_inner + 60 2 libmonobdwgc-2.0.dylib 0x33977abf8 GC_clear_stack_inner + 88 3 libmonobdwgc-2.0.dylib 0x33977abf8 GC_clear_stack_inner + 88 4 libmonobdwgc-2.0.dylib 0x33977abf8 GC_clear_stack_inner + 88 5 libmonobdwgc-2.0.dylib 0x33977abf8 GC_clear_stack_inner + 88 6 libmonobdwgc-2.0.dylib 0x33977abf8 GC_clear_stack_inner + 88 7 libmonobdwgc-2.0.dylib 0x33977abf8 GC_clear_stack_inner + 88 8 libmonobdwgc-2.0.dylib 0x33977abf8 GC_clear_stack_inner + 88 9 libmonobdwgc-2.0.dylib 0x33977abf8 GC_clear_stack_inner + 88 10 libmonobdwgc-2.0.dylib 0x33977abf8 GC_clear_stack_inner + 88 11 libmonobdwgc-2.0.dylib 0x33977abf8 GC_clear_stack_inner + 88 12 libmonobdwgc-2.0.dylib 0x33976b518 GC_clear_stack + 76 13 libmonobdwgc-2.0.dylib 0x33973c074 mono_gc_alloc_obj + 112 14 libmonobdwgc-2.0.dylib 0x3396e0db4 mono_object_new_specific_checked + 72 15 libmonobdwgc-2.0.dylib 0x3396e116c ves_icall_object_new_specific + 28`
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Feb ’25
system crashed when run java
My book env: MacBook Air Apple M4 15.6.1 (24G90) I installed JDK hs_err_pid6813.log by sdkman and homebrew, but when I ran java, os crashed: /opt/homebrew/o/openj/libexec/openjdk.jdk/Contents/Home/bin | stable ./javac --verison ABRT | 12:32:20 # # A fatal error has been detected by the Java Runtime Environment: # # SIGBUS (0xa) at pc=0x000000010211b340, pid=7237, tid=9987 # # JRE version: (21.0.7) (build ) # Java VM: OpenJDK 64-Bit Server VM (21.0.7, mixed mode, sharing, tiered, compressed oops, compressed class ptrs, g1 gc, bsd-aarch64) # Problematic frame: # V [libjvm.dylib+0x35f340] CodeHeap::allocate(unsigned long)+0x15c # # No core dump will be written. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again # # An error report file with more information is saved as: # /opt/homebrew/Cellar/openjdk@21/21.0.7/libexec/openjdk.jdk/Contents/Home/bin/hs_err_pid7237.log # # [1] 7237 abort ./javac --verison Does that mean I have to reinstall OSX?
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2w
Unlocking hidden "Developer mode" option on Ipad (without Mac or Xcode)
Hello, I have an iphone but not an ipad Actually a relative has an iPad. The problem I encoutered was when i was testing an app that I had built prior (so I had the ipa file) but no acces to Xcode. The thing is when I wanted to test it on my iphone, everything WENT SMOOTH and ok. When I tried on iPAD, I encounteed the problem I could not unlock the hidden "developer mode" option in any way, I tried so many things, checked and rechecked, the option was and stayed hidden, I could not activate it. Therefore I could not test the app. In the apple store I was required to give a screenshot for iPAD but that failed. because I could not produce ANY, since I could not run my app on iPAD. I actually have no idea how I activated the ability to turn on the developer mode on my iphone, it was just there and I activated it perhaps because I had added the email of my iphone to the developer account somehow? somehwere? But for iPAD I just could not find a way to do it, don't know if adding it somewhere could trigger something on the ipad to allow it to show the developer mode option so I can activate it finally? Anyway, I tried things I read on internet, methods that mention how to activate the developer mode ability on an ios devide though WINDOWS, there were 2 but one I did not trust much, and even I think i tried it and in the end it did not work for some incompatibility making that method obsolete or something? the other I am not sure but probably same idea. I would like to know, how to activate the ABILITY to SHOW the option to activate the developer mode on iPAD (or any other device but for now I am focuson on iPad) please, and without using macbook or xcode!? Could Apple or anyone offer some guidance? That would help a fellow developer. Thank you. Ps. No I cant get the mac or xcode for now (but hopefully in a far future, but for now I can't). Thanks
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1w
Could you please add a feedback/question feature for the Apple Developer Documentation?
Routinely I'll have additional questions when browsing the Apple Developer Documentation. Would be really convenient if we could just submit that feedback from the documentation webpage itself, Apple could have the data, and potentially down the line address it; but at least you'd have the data. For example, I'm looking at the documentation for AttributedString: https://developer.apple.com/documentation/foundation/attributedstringprotocol/index(_:offsetbycharacters:) Now, I would like to know what would happen if the distance brought the position past the end, what would be returned. Because it's non-optional which I imagine would imply nil would be returned if the parameters were invalid. But it doesn't say. I run into these small missing behavioral details with some regularity and imagine others do as well. It would be really great if we could just submit that discrepancy and perhaps see some numbers on the page of the total number of discrepancies submitted or something so we can see that it's not just us and have some peace of mind that based on the amount of feedback submitted there's a higher chance that this discrepancy will be addressed in the future.
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Apr ’25
App crashing on startup
I am a developer working on an iOS enterprise application. When I deployed the release version to my device, it crashes upon startup. It works fine in debug mode on my device. The app is an upgraded version of Xamarin Form to .NET MAUI. I have attached a crash report. I would appreciate any help/insights on how to resolve. --John
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Apr ’25
NSUserDefaults + iPhone Transfer Issues
Hi! I was wondering if anyone else encountered similar issues and what the solution ended up being. We're encountering weird sign-in issues on our iOS version of our app. It seems like an uninstall and reinstall solves it, but the issue seems to only impact users who underwent the transfer process from one iOS device to another. What I am curious about: What is copied over from one device to another in this process? Is there a way outside of owning multiple test devices to replicate this flow? Our current suspicion is that NSUserDefaults is not being cleared by our app on first start, and that stale data is copied over during this transfer process, breaking the sign-in until a re-install wipes everything properly. Does it seem like we're on the right track with this assumption, or completely out to lunch?
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Apr ’25