Updated Xcode from 16.2 to 16.4, running Time Profile in Instruments, it launches the trace, but does not install or load on connected device, breaks the functionality. I am unable to debug... ERROR: Connection with the remote side was unexpectedly closed : <dictionary: 0x1f3c8b6d0> { count = 1, transaction: 0, voucher = 0x0, contents = "XPCErrorDescription" => <string: 0x1f3c8b850> { length = 22, contents = "Connection interrupted" } } Domain: IXRemoteErrorDomain Code: 6 User Info: { DVTErrorCreationDateKey = "2025-08-09 00:47:53 +0000"; } -- Connection with the remote side was unexpectedly closed : <dictionary: 0x1f3c8b6d0> { count = 1, transaction: 0, voucher = 0x0, contents = "XPCErrorDescription" => <string: 0x1f3c8b850> { length = 22, contents = "Connection interrupted" } } Domain: IXRemoteErrorDomain Code: 6 IOS 18.5

**Background: Many iOS/macOS developers have faced issues like: • Autocomplete randomly stopping • Indexing freezing or slowing down • SwiftUI previews breaking unexpectedly • Build process hanging or crashing Even after multiple updates, these issues seem to come back in different forms. ** Do you think Apple should consider a full architectural rewrite of Xcode? Would separating SDK updates from IDE updates help? How do you personally deal with Xcode’s instability in your workflow?

After porting code to Swift 6 (Xcode 16.4), I get a consistent crash (on simulator) when using UNUserNotificationServiceConnection It seems (searching on the web) that others have met the same issue. Is it a known Swift6 bug ? Or am I misusing UNUserNotification ? I do not have the crash when compiling on Xcode 26 ß5, which hints at an issue in Xcode 16.4. Crash log: Thread 10 Queue : com.apple.usernotifications.UNUserNotificationServiceConnection.call-out (serial) As far as I can tell, it seems error is when calling nonisolated func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) I had to declare non isolated to solve a compiler error. Main actor-isolated instance method 'userNotificationCenter(_:didReceive:withCompletionHandler:)' cannot be used to satisfy nonisolated requirement from protocol 'UNUserNotificationCenterDelegate' I was advised to: Add 'nonisolated' to 'userNotificationCenter(_:didReceive:withCompletionHandler:)' to make this instance method not isolated to the actor I filed a bug report: Aug 10, 2025 at 2:43 PM – FB19519575

I have a visionOS 2 project created on Xcode 16, when I updated to Xcode 26 beta5, I can't build it any more, every time it stuck in process like the picture shows below: Already tried many methods to fix this issue, such as clear build folders, but don't work. MacBook Air M2 / MacOS 26 beta5 / Xcode 26 beta5

Hello. I was working on a Unity game for iPhone, but Apple said that it is impossible to prohibit downloading to iPad. They tested it on iPad Air 5, and for some reason the game did not work correctly - nothing happened when launched, although everything was fine in the simulator and in the real iPhone. Please tell me what to do?

When I try to install the iOS 26.0 Universal Simulator component with Xcode-beta 5 I get the following error: Download failed. Domain: DVTDownloadableErrorDomain Code: 41 User Info: { DVTErrorCreationDateKey = "2025-08-11 14:39:06 +0000"; } -- Download failed. Domain: DVTDownloadableErrorDomain Code: 41 -- System Information macOS Version 15.6 (Build 24G84) Xcode 26.0 (24198.5) (Build 17A5295f) Timestamp: 2025-08-11T17:39:06+03:00

Ok, I'm going crazy here. I have a static library for iOS that I want to build for the simulator. I use xcodebuild -destination="iOS Simulator" and then check the library using otool which tells me the platform is 6, which is Mac Catalyst. When I look at the output of xcodebuild, it says --- xcodebuild: WARNING: Using the first of multiple matching destinations: { platform:macOS, arch:arm64, variant:Mac Catalyst, id:00006041-0008492E3AA1801C, name:My Mac } ... It has the simulator listed too, way down the list: { platform:iOS Simulator, arch:x86_64, id:AB7A99B3-8D24-4F73-A42D-9BB45321928D, OS:18.6, name:iPad (A16) } When I put all of that into xcodebuild for the platform, it still says there are multiple matching destinations and chooses Mac Catalyst. Why? How? What? Does platform="iOS Simulator" mean nothing? How in the world does "Mac Catalyst" match "iOS Simulator"????? I don't want Mac Catalyst, I don't need Mac Catalyst, and I can't get rid of Mac Catalyst. Nothing I specify in xcodebuild results in anything I can build that will compile for the simulator. What the heck am I doing wrong?

Good day! When your project have total 887 or more SPM local targets and then you try to build it, xcodebuild will be crash. Crash log: SWBBuildService-2025-08-11-151103.ips Thread 2 Crashed:: Dispatch queue: com.apple.root.default-qos.cooperative 0 libxpc.dylib 0x197c4826c _availability_version_check + 8 1 libswiftCore.dylib 0x1a9b44428 __isPlatformVersionAtLeast + 92 2 libswiftCore.dylib 0x1a9a6e054 _swift_allocObject_ + 1100 3 SWBMacro 0x104a9c408 specialized _ArrayBuffer._consumeAndCreateNew(bufferIsUnique:minimumCapacity:growForAppend:) + 116 4 SWBMacro 0x104a97b58 specialized Array.append<A>(contentsOf:) + 116 5 SWBMacro 0x104a954e8 MacroEvaluationProgram.executeInContext(_:withResultBuilder:alwaysEvalAsString:) + 160 6 SWBMacro 0x104a96548 MacroEvaluationProgram.executeInContext(_:withResultBuilder:alwaysEvalAsString:) + 4352 7 SWBMacro 0x104a96548 MacroEvaluationProgram.executeInContext(_:withResultBuilder:alwaysEvalAsString:) + 4352 8 SWBMacro 0x104a96548 MacroEvaluationProgram.executeInContext(_:withResultBuilder:alwaysEvalAsString:) + 4352 9 SWBMacro 0x104a96548 MacroEvaluationProgram.executeInContext(_:withResultBuilder:alwaysEvalAsString:) + 4352 10 SWBMacro 0x104a96548 MacroEvaluationProgram.executeInContext(_:withResultBuilder:alwaysEvalAsString:) + 4352 But if you try to build Package.swift via swift build command, it works. Here you can open sample project: Just Package.swift with SPM 900 targets Open Package.swift via Xcode 26 any beta and try to build Xcode workspace with SPM 900 targets Open MyApp.xcworkspace and try to build You can also make by self the Package.swift (also make required directories for SPM): // swift-tools-version: 5.9 import PackageDescription // let count = 800 // no crash let count = 900 // crash let targetsNames = (1...count).map { "Pkg1Target\($0)" } let targets = targetsNames.map { Target.target(name: $0) } let package = Package( name: "Pkg1TargetLibrary", platforms: [.iOS(.v16)], products: [ .library(name: "Pkg1TargetLibrary", targets: targets.map(\.name)), ], targets: targets )

I use Carthage to build a set of dependencies. I generate .xcframework files with code for both macOS and iOS. This works through Xcode 26 beta 4. With Xcode 26 beta 5, the resulting .xcframework files seem to have code only for iOS, not macOS. Each framework has a ios-arm64 directory and a ios-arm64_x86_64-simulator directory, but no macos-arm64_x86_64 directory. This is affecting 3 of my 7 cross-platform dependencies that I compile with Carthage. What those 3 seem to have in common is that each has one target and scheme for the shared library – instead of one for iOS and another for macOS. I may have to create a second scheme and target in each of these dependencies, or move to SPM. But I am wondering if anyone has another suggestion. Thank you. John

Starting Xcode 14, iOS Simulator is able to communicate with APNs in order to register for notification in the sandbox environment. I created a sample test for this. A dumb iOS application that registers for notifications. It has UITests to automatize the tap on the consent popup (it is not possible to ask for the permission via CLI sadly). Once the application registers, the AppDelegate method didRegisterForRemoteNotificationsWithDeviceToken is called and the device token is sent to a local server application (node.js). The test itself creates an iOS 18.6 Simulator with xcrun simctl, builds such app and run the tests through through CLI with xcodebuild. Running this on my personal Macbook Pro M1 2021 goes well every time, so I wanted to bring it on Github Actions (arm64 macOS machines), in order to test the works on a open source library I'm building (hapns). Contacting Github support led me to test this on a macOS image running inside a VM inside a Veertu Anka container on my personal Macbook Pro, due to an VM architectural limit suspicion. The results were the same: iOS simulator isn't able to receive the device token. Not even didFailToRegisterForRemoteNotificationsWithError is called (tested through some network probes-requests that communicate to the server which checkpoints the process reached). So, as asked, I've setup a repro-case to be run in the VM and I've collected VM diagnostics ready to be tested and attached. Does anyone know if there is some unspecified (or specified but buried in the documentation) limit for this? Thanks. Github discussion link for further details, repro-case and so on: https://github.com/actions/runner-images/issues/12747

Hi, Ever since upgrading to Version 26.0 beta 5 (17A5295f) Xcode constantly locks up with the Beach Ball of Death icon. I can't even work on any apps/projects. Anyone else having issues? Dan Uff

Is iOS 26 Beta 6 available in the iOS Simulator? I saw that the latest betas launched earlier this week. I updated my dev machine to macOS 26 Beta 6, however this release had no corresponding Xcode 26 Beta 6. So I am still running Xcode Beta 5 and when I go into Settings -> Components within Xcode there is no option to install iOS 26 Beta 6. It's still running Beta 5 for macOS and iOS. Is that correct? My current assumption is that iOS Beta 6 is for physical devices only?

Hello. I was working on a Unity game for iPhone, but Apple said that it is impossible to prohibit downloading to iPad. They tested it on iPad Air 5, and for some reason the game did not work correctly - nothing happened when launched, although everything was fine in the iPad Air 5 simulator and in the real iPhone. Please tell me what to do?

Hi, I am on Mac OS Sequoia 15.5, XCode 16.4 (16F6) Uploading via XCode or Transporter is successful, then binary gets refused by App Store Connect. I have tried: Removing all Other Linker Flags except -ld64 as the app cannot be generated without ld64. My original Other Linker Flags: -all_load -w -Xlinker -no_objc_category_merging -ld64 2. Running xcrun dyld_info -objc Payload/YourApp.app/YourApp | grep "(null)" return nothing. Please, advise what else can I do.

I'm experiencing an issue here on my Xcode 16.4, where i can't download the supported iOS 18.6 runtime because it stays stuck on the 'preparing' state. I have also tried getting it manually from the dev site but they only have 18.2. The only runtime that would download easily via Xcode was 17.5 but I can't build my project with that. I have tried using curl to even get a download url, nothing worked. All my terminal approach didn't work also. Any help or guidance to sort this out? Thank you.

I'm using the WebGPU abstraction library wgpu to build an app using compute shaders that compiles to Metal (on macOS), and in certain patterns where it uses a staging buffer for initial data, the data is just total missing from the capture, breaking other workflows such as shader debugging or seeing the completed results in the final buffer. I wrote up details including a repro project and screen shots of the issue at https://github.com/gfx-rs/wgpu/issues/8111 . Seems like an Xcode bug. Any ideas? I'm happy to help investigate further if I can.

I'm having a problem with Xcode 26 where a symbol bug is causing my app to crash at launch if they are running iOS 17.X This has to do with a HealthKit API that was introduced in iOS 18.1 HKQuantityType(.appleSleepingBreathingDisturbances), I use availability clauses to ensure I only support it in that version. This all worked fine with Xcode 16.4 but breaks in Xcode 26. This means ALL my users running iOS 17 will get at launch crashes if this isn't resolved in the Xcode GM seed. I'll post the code here in case I'm doing anything wrong. This, the HealthKit capability, the "HealthKit Privacy - Health Share Usage Description" and "Privacy - Health Update Usage Description", and device/simulator on iOS 17.X are all you need to reproduce the issue. I've made a feedback too as I'm 95% sure it's a bug: FB19727966 import SwiftUI import HealthKit struct ContentView: View { var body: some View { VStack { Image(systemName: "globe") .imageScale(.large) .foregroundStyle(.tint) Text("Hello, world!") } .padding() .task { print(await requestPermission()) } } } #Preview { ContentView() } func requestPermission() async -> Bool { if #available(iOS 18.0, *) { let healthTypes = [HKQuantityType(.appleSleepingBreathingDisturbances)] var readTypes = healthTypes.map({$0}) let write: Set<HKSampleType> = [] let res: ()? = try? await HKHealthStore().requestAuthorization(toShare: write, read: Set(readTypes)) guard res != nil else { print("requestPermission returned nil") return false } return true } else { return false} }

Whenever I hit play on my app to test it on the Mac the register .app part starts taking more than 15 minutes, this is severely impacting my work. There's no indication on what's wrong and how can I fix this.

My company's app has a few widgets and a couple of them we do not want to show up on CarPlay due to safety concerns when iOS 26 releases. I understand Apple's recommended way to prevent users from using your widget in CarPlay is to use the .disfavoredLocations([.carPlay], for: [.systemSmall]), and this puts your widget in the 'Other' section of the widgets. https://developer.apple.com/download/files/CarPlay-Developer-Guide.pdf However, this .carPlay widget location is only available in Xcode 26, and our app cannot be built on Xcode 26 yet due to some build errors. We are able to fix those build errors in a separate branch, but we won't be doing our official release builds on Xcode 26 until it is out of beta, which is usually right before iOS 26 officially releases to general audiences. We release our app versions on a monthly cadence, so the version that will be out when iOS 26 comes out is already in testing. Is there any existing way we can disable this widget on CarPlay so it does not appear to work when tapped? Currently, it opens our CarPlay app, but the CarPlay app does nothing with it. On the iPhone, when you tap the widget it opens our app and performs a function. We don't wan't to disable it on the iPhone, just when it's on CarPlay. We don't have time before the app release to implement the same functionality on our CarPlay app. I haven't found any reliable way to detect if the widget is running in the CarPlay location versus the iPhone home screen. Thanks in advance for any assistance.

I've been running into issues with Xcode Cloud/my workflow when it's trying to archive the app. I've tested locally and both archiving and building the app for release works. I've tried a few things to clear it. pod deintegrate and pod install Checking off "archive" for the build scheme Creating a certificate for both development and distribution. I made sure automatic signing was enabled as well. I have a ci_scripts/ci_post_clone.sh script that successfully completes. Have tried setting the xcode version of the workflow to 16.2 which is what my local xcode version is. I've switched it back to the latest, 16.4. running pod update Updating flutter However, I consistently get the following 2 errors : `Showing All Messages Run command: 'xcodebuild archive -workspace /Volumes/workspace/repository/ios/Runner.xcworkspace -scheme Runner -destination generic/platform=iOS -archivePath /Volumes/workspace/build.xcarchive -derivedDataPath /Volumes/workspace/DerivedData -resultBundleVersion 3 -resultBundlePath /Volumes/workspace/resultbundle.xcresult -resultStreamPath /Volumes/workspace/tmp/resultBundleStreame3592434-5b88-48da-a3c4-f750abee4d08.json -IDEPostProgressNotifications=YES CODE_SIGN_IDENTITY=- AD_HOC_CODE_SIGNING_ALLOWED=YES CODE_SIGN_STYLE=Automatic DEVELOPMENT_TEAM=JG794CQD68 COMPILER_INDEX_STORE_ENABLE=NO -hideShellScriptEnvironment' ` and Showing All Messages Unhandled exception: ProcessException: No such file or directory Command: /Users/local/flutter/bin/flutter assemble --no-version-check --output=/Volumes/workspace/DerivedData/Build/Intermediates.noindex/ArchiveIntermediates/Runner/BuildProductsPath/Release-iphoneos/ -dTargetPlatform=ios -dTargetFile=lib/main.dart -dBuildMode=release -dConfiguration=Release -dIosArchs=arm64 -dSdkRoot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS18.5.sdk -dSplitDebugInfo= -dTreeShakeIcons=true -dTrackWidgetCreation=false -dDartObfuscation=false -dAction=install -dFrontendServerStarterPath= --ExtraGenSnapshotOptions= --DartDefines=RkxVVFRFUl9WRVJTSU9OPTMuMzUuMQ==,RkxVVFRFUl9DSEFOTkVMPXN0YWJsZQ==,RkxVVFRFUl9HSVRfVVJMPWh0dHA6Ly9naXRodWIuY29tL2ZsdXR0ZXIvZmx1dHRlci5naXQ=,RkxVVFRFUl9GUkFNRVdPUktfUkVWSVNJT049MjBmODI3NDkzOQ==,RkxVVFRFUl9FTkdJTkVfUkVWSVNJT049MWU5YTgxMWJmOA==,RkxVVFRFUl9EQVJUX1ZFUlNJT049My45LjA= --ExtraFrontEndOptions= -dSrcRoot=/Volumes/workspace/repository/ios -dTargetDeviceOSVersion= -dCodesignIdentity=- release_ios_bundle_flutter_assets #0 _ProcessImpl._runAndWait (dart:io-patch/process_patch.dart:519:7) #1 _runNonInteractiveProcessSync (dart:io-patch/process_patch.dart:686:18) #2 Process.runSync (dart:io-patch/process_patch.dart:79:12) #3 Context.runSyncProcess (file:///Users/local/flutter/packages/flutter_tools/bin/xcode_backend.dart:154:20) #4 Context.runSync (file:///Users/local/flutter/packages/flutter_tools/bin/xcode_backend.dart:118:34) #5 Context.buildApp (file:///Users/local/flutter/packages/flutter_tools/bin/xcode_backend.dart:539:34) #6 Context.run (file:///Users/local/flutter/packages/flutter_tools/bin/xcode_backend.dart:51:9) #7 main (file:///Users/local/flutter/packages/flutter_tools/bin/xcode_backend.dart:17:5) #8 _delayEntrypointInvocation.<anonymous closure> (dart:isolate-patch/isolate_patch.dart:312:33) #9 _RawReceivePort._handleMessage (dart:isolate-patch/isolate_patch.dart:193:12) Command PhaseScriptExecution failed with a nonzero exit code Any help here would be greatly appreciated.