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.

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'm trying to download the iOS 26 restore image for my iPhone 14 Pro Max, which is my test device. However, when I attempted to install it directly via the over-the-air (OTA) update, the iPhone rebooted to the iOS 26 "Welcome" screen, but with no touch functionality—the screen was completely unresponsive. I restored the device back to iOS 18.5 and tried the OTA update again, but once more, the touch screen stopped working upon completion. Now, I am trying to download the iOS 26 restore image from the official developer page (https://aninterestingwebsite.com/download/#ios-restore-images-ipad-new) to install it manually using my Mac. However, I've run into a problem with the download links: The link for the iPhone 14 Pro Max (iOS 26) restore image actually downloads the iPhone 14 Pro (iOS 18.5) image. Conversely, the link for the iPhone 14 Pro seems to provide the correct iPhone 14 Pro Max (iOS 26) image. The issue is that when I try to restore my iPhone using this seemingly correct file, I receive an error that the firmware file is not valid or compatible. I suspect it's not being properly signed by Apple for my device during the restore process. Does anyone have the correct, official download link for the iOS 26 restore image for the iPhone 14 Pro Max? How can I fix these errors?

As it has already been reported elsewehere, I also face the problem of endless waiting time for my submissions to be notarized. This prevents me from shipping a new release. A waiting/processing time of multiple days is simply unacceptable. I kindly request to fix this.

Currently, if as a library author you are shipping dependencies as code, you can use the #if DEBUG preprocessor check to execute logic based on whether app is being built for Debug or Release. My concern is more about the approach that should be taken when distributing frameworks/xcframeworks. One approach I am thinking of using is checking the presence of {CFBundleName}.debug.dylib in the main bundle. Is this approach reliable? Do you suggest any other approach?

Xcode 16.2 Flutter version 3.27.1 0 0x1008abee4 __assert_rtn + 160 1 0x1008add9c ld::tool::OutputFile::setFixup64(unsigned char*, unsigned long long, ld::Atom const*) (.cold.3) + 0 2 0x100789640 ld::tool::OutputFile::setFixup64(unsigned char*, unsigned long long, ld::Atom const*) + 656 3 0x100785b78 ld::tool::OutputFile::applyFixUps(ld::Internal&, unsigned long long, ld::Atom const*, unsigned char*) + 4388 4 0x10078be18 ___ZN2ld4tool10OutputFile10writeAtomsERNS_8InternalEPh_block_invoke + 488 5 0x19bc19428 _dispatch_client_callout2 + 20 6 0x19bc2d850 _dispatch_apply_invoke3 + 336 7 0x19bc193e8 _dispatch_client_callout + 20 8 0x19bc1ac68 _dispatch_once_callout + 32 9 0x19bc2c8a4 _dispatch_apply_invoke + 252 10 0x19bc193e8 _dispatch_client_callout + 20 11 0x19bc2b080 _dispatch_root_queue_drain + 864 12 0x19bc2b6b8 _dispatch_worker_thread2 + 156 13 0x19bdc5fd0 _pthread_wqthread + 228 A linker snapshot was created at: /tmp/Test Kopi Kenangan.debug.dylib-2025-02-27-100512.ld-snapshot ld: Assertion failed: (reconstituted == accumulator), function setFixup64, file OutputFile.cpp, line 2975. clang: error: linker command failed with exit code 1 (use -v to see invocation)

I'm unable to sign in to Feedback Assistant on macOS. I have two Apple accounts and neither will sign in. I am able to sign in via the website. With the desktop app I'm getting a rather generic error message: "Unable to sign in to Feedback Assistant Thank you for your patience. Please try again later." This started this morning.

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?

I read on this documentation : https://aninterestingwebsite.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.

There was a time that Apple Developer Documentation provides a filter to show the changes across versions, at https://aninterestingwebsite.com/documentation/technologies , with purple (modified), green (added), and red (deprecated) annotations. I wonder if this feature is completely removed, or is it still hiding somewhere? It is helpful to diff the API changes among versions. Thanks. edit: as pointed out by Rick, here is an archive link to what it used to look like

A user of my app sent me a crash report. I have never seen one like this before. All of my app's symbols are replaced with three question marks (???) Thread 0 Crashed:: Dispatch queue: com.apple.main-thread 0 ??? 0x10844eb40 ??? 1 CoreFoundation 0x7ff80f155518 __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 137 and the binary image as 0x0 - 0xffffffffffffffff ??? (*) <00000000-0000-0000-0000-000000000000> ??? so I cannot find out where exactly the crash happened. What can cause this kind of crash report and can I do anything with it? crash.ips

"UITests recording reports 'The capability "Create Service Socket" is not supported by this device.' on M1 chip, but works normally on Intel chip."

I have been working on a M1 Mac mini, using my iPad Air M2 running 26.3 iPadOS. Switched to a new M4 Mac mini, went to connect my iPad to run from Xcode and was presented this "The developer disk image could not be mounted on this device." So how can a get an updated DDI? I appreciate any ideas. /Users/robertlawson/Desktop/Screenshot 2026-02-15 at 8.21.50 PM.png

There is an error when building binutils. /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/_stdio.h:318:7: note: to match this '(' /Users/koudah/elf2x68k/build_gcc/src/binutils-2.42/zlib/zutil.h:147:33: note: expanded from macro 'fdopen' 147 | # define fdopen(fd,mode) NULL /* No fdopen() */ | ^

Starting yesterday, the API is returning 302 Moved Temporarily" redirecting the API to Location: https://aninterestingwebsite.com/weatherkit/ Is this happening for anyone else? This is incorrect, it should be giving an API JSON response as specified by: https://aninterestingwebsite.com/documentation/weatherkitrestapi/get-api-v1-weather-_language_-_latitude_-_longitude_

Hi, We use Flat package installers (.pkg based installers) to install our applications on macOS. In macOS 26.1, installation is failing with the error Unable to use PK session due to incompatible packages. Terminating. 2025-11-03 14:22:36+05:30 Admin-3 installer[1160]: Install failed: The Installer could not install the software because there was no software found to install. Same installer package is working on macOS 26. Any help is greatly appreciated.

Hi, Some crashes downloaded from TestFlight aren't symbolicated by Xcode and I don't know why, here's an example: Although all uploaded builds contain debug symbols (Symbols directory with .symbols files) and other crashlogs in the same version are symbolicated just fine (also visible on the above SS). I have access only to the .symbols files but not to the original dSYMs and I wonder how to perform symbolication manually. I tried pointing atos and symbolicatecrash utilities to respective .symbols file, but they are unable to work with it. I'm sure it's possible as TestFlight symbolicates crashlogs using only .symbols files somehow. Could you give a hint?

Dear Apple,I'm an iOS developer and provided feedback in the good old online bug tracker for many years.Decent conversations with Apple egnineers often resulted in bug fixes or updated documentation.The fact that my contributions helped to improve the products was rewarding.So I kept adding reports in the new Feedback Assistant app in macOS Catalina.But ever since (September 2019) I never ever got any response on any ticket.1 month ago I even added a report if Apple even read my reports. Again, no response ever since.So my question on this forum: Is Apple actually reading reports in the new Feedback Assistant?This can either be answered by Apple, or by other Developers that hopefully did response feedback from Apple. Or did not.Best regards,Martijn

Hi Apple Engineers and fellow developers, I'm a student developer working on an educational focus management app that helps users hide distracting apps during study sessions. The app consists of: macOS app: Simple "Hide apps" button that triggers app hidding sessions iOS app: Uses Screen Time API to temporarily hide selected apps from home screen Communication: Bonjour networking between Mac and iPhone for session coordination The Challenge My app requires two entitlements that aren't available with Personal Developer Teams: com.apple.developer.family-controls (for Screen Time API) com.apple.developer.networking.multicast (for Bonjour device discovery) Current Error Messages text Cannot create a iOS App Development provisioning profile for "focuser.focuser-app". Personal development teams, including "My Name", do not support the Family Controls (Development) capability. Provisioning profile doesn't include the com.apple.developer.family-controls and com.apple.developer.networking.multicast entitlements. My Question for Apple Engineers Is there any legitimate way to test these privacy-sensitive APIs on my own devices for educational/learning purposes without purchasing the $99/year Apple Developer Program membership? I understand the security reasons behind these restrictions, but as a student just learning iOS development, it creates a significant barrier to experimenting with these technologies.

I used to develop iPhone apps about a decade ago and am now back at it with an iPhone and companion Apple Watch app. Why does it suck so bad? I a must be doing something wrong, but what I am doing is out of the box. The majority of the time when I go to build on the watch I get: Previous preparation error: A connection to this device could not be established.; Timed out while attempting to establish tunnel using negotiated network parameters. Which I then first try to force quit the app on the watch and if that does not work, reboot the watch (which is pretty ridiculous). I tried Gemini and it gave me the following explanation: This is arguably the single most frustrating error in the entire watchOS development ecosystem. As an expert, I can tell you that you are not doing anything wrong; you are fighting a fragile architecture. Here is the technical breakdown of why this happens and a workflow to mitigate it without constant reboots. The Technical "Why" This error message reveals that the issue lies in the CoreDevice (and formerly usbmuxd) infrastructure, specifically in the secure transport layer. The "Tunnel" Failure: Xcode attempts to establish a secure, encrypted tunnel (DTXConnection) to the Apple Watch to push the debugger and the app binary. Unlike the iPhone, which can sustain a high-bandwidth connection easily, the Watch aggressively manages its radios (Bluetooth vs. WiFi vs. AWDL) to save battery. The "Handshake" Timeout: If the Watch is on Bluetooth (Low Energy) when Xcode initiates the tunnel, the bandwidth is insufficient. The system tries to escalate the connection to WiFi (or Apple Wireless Direct Link). If this negotiation takes even a few milliseconds too long—due to 2.4GHz interference, router mDNS configuration, or the Watch CPU being throttled—the handshake times out. The "Previous Preparation Error": This is the insidious part. Once the handshake fails once, Xcode’s device service caches that failure state for the device UUID. It marks the device as "unreachable" to prevent the IDE from hanging indefinitely on subsequent tries. Why you see it constantly: You aren't actually triggering a new connection attempt; you are hitting the cached "failed" state immediately. Unfortunately, the solutions it gives me are: The "Wired Proxy" Method (Most Reliable) This is the gold standard for watchOS debugging. Do not rely on "Connect via Network" for the Watch directly if you can avoid it. Disable WiFi on your Mac (temporarily) or ensure the Mac and iPhone are on the exact same SSID. Plug your iPhone into the Mac via USB. Ensure the Watch is paired to that iPhone. Result: Xcode will tunnel the instructions through the USB connection to the Phone, and the Phone acts as a high-bandwidth proxy to the Watch. This eliminates the "Mac-to-Watch" WiFi negotiation failure point. Do you hit this regularly? What do you do to make for a smooth development and deployment process? Or is it really this fragile? Thanks for any help! Bryan