We are trying to track down some build failures that started happening only in our Jenkins CI environment. error: Failed to decode version info for '/Applications/Xcode.app/Contents/Developer/usr/bin/actool': The data couldn’t be read because it is missing. (stdout: '<?xml version="1.0" encoding="UTF-8"?> [2025-07-30T19:21:18.479Z] <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> [2025-07-30T19:21:18.479Z] <plist version="1.0"> [2025-07-30T19:21:18.479Z] <dict> [2025-07-30T19:21:18.479Z] <key>com.apple.ibtool.version</key> [2025-07-30T19:21:18.479Z] <dict> [2025-07-30T19:21:18.479Z] <key>bundle-version</key> [2025-07-30T19:21:18.479Z] <string>24112</string> [2025-07-30T19:21:18.479Z] <key>short-bundle-version</key> [2025-07-30T19:21:18.479Z] <string>26.0</string> [2025-07-30T19:21:18.479Z] </dict> [2025-07-30T19:21:18.479Z] </dict> [2025-07-30T19:21:18.479Z] </plist> [2025-07-30T19:21:18.479Z] ', stderr: '' Key facts we've noted: Locally I cannot reproduce the problem We did not see this problem with previous Xcode 26 betas If I remote into the machine and run build commands from the command line I cannot reproduce the problem The very first build succeeds, every build after that on this machine fails from jenkins actool --version is spitting out the version information for ibtool, but only in the context of running from a jenkins agent. If I run this locally or if I remote into the CI machine and run this from the terminal I cannot reproduce this behavior. Command line tools appear to be installed, xcode-select --install fails if I try to do it from the command line. We've tried to recreate the build agents for this jenkins environment exactly as they were for all previous betas and xcode versions, and still get this behavior.

Not a question, but a surprise. Did I miss something, but apparently there has been no new beta release (16.3) since Release of 16.2 on Dec 11. 2 months without betas is really unusual (in fact, it never happened and usually, next beta n+1 is even released before the final release of version n). So does that mean 16.3 will be a major update ? Wait and see.

Below is an English version of your post, ready to copy-and-paste into the Apple Developer Forums: I’m seeing a crash in Xcode 26 beta 3 whenever the StoreKit symbol SKStoreProductParameterAdNetworkSourceIdentifier is present while running on an iOS 15 simulator. Steps to reproduce Install Xcode 26 beta 3. Create any iOS app and run it on an iOS 15 simulator (device model doesn’t matter). Add the following code anywhere and run: override func viewDidLoad() { super.viewDidLoad() if #available(iOS 16.1, *) { print("SKStoreProductParameterAdNetworkSourceIdentifier: \(SKStoreProductParameterAdNetworkSourceIdentifier)") } } The project builds successfully, but before the #available(iOS 16.1, *) check is reached, the app crashes with: Symbol not found: _SKStoreProductParameterAdNetworkSourceIdentifier When I build the same project with Xcode 16.4 and launch it on an iOS 15 simulator, it runs without crashing. Investigation so far Because SKStoreProductParameterAdNetworkSourceIdentifier is just an NSString, I could substitute the string literal "SKStoreProductParameterAdNetworkSourceIdentifier" as a temporary workaround, but that doesn’t feel like a proper fix. The symbol is still declared in both SDKs: /Applications/Xcode-16.4.0.app/.../StoreKit.framework/Headers/SKAdNetwork.h:48: SK_EXTERN NSString * const SKStoreProductParameterAdNetworkSourceIdentifier API_AVAILABLE(ios(16.1)) API_UNAVAILABLE(macos, watchos, visionos); /Applications/Xcode-26.0.0-Beta.3.app/.../StoreKit.framework/Headers/SKAdNetwork.h:48: SK_EXTERN NSString * const SKStoreProductParameterAdNetworkSourceIdentifier API_AVAILABLE(ios(16.1)) API_UNAVAILABLE(macos, watchos, visionos); So the symbol hasn’t been removed in the beta SDK. Given that the code is wrapped in #available(iOS 16.1, *), I don’t believe the sample itself is at fault. Questions Could this be a bug in Xcode 26’s availability checking or linker? Has anyone else encountered the same issue or found a more robust workaround? Any insights would be greatly appreciated.

SwiftUI preview hangs on "Preparing iPhone Simulator for Previews". Also simulator hangs when trying to build and run. This occurred after I installed iOS 17 simulator. I tried reverting back to an iOS 16 version of the simulator, but haven't figured out how to do that. Build and run to an iPhone device works fine. Any ideas would be appreciated. Thanks.

I am editing my iOS project in Xcode 16 and want to use the "Swift Compiler - Upcoming Features" section of the build settings to selectively enable the new Swift 6 language features. I have read the instructions for doing this and have dowloaded an Apple sample project and can see that section under the project and target-level Build Settings in the sample project However, when I open my Xcode project in XCode 16 that section does not appear. Is there any way for me to influence how Xcode 16 displays the build settings? In fact, no "Swift Compiler" sections appear at all under my project Build Settings (All | Combined). There is a "User-Defined" section that has the Swift Version, Compilation Mode and Optimization level. The project itself is several years old and was on a very old project version. I have upgraded my project document format to "Xcode 16" but it made no difference. I have compared my project and the sample project in a text editor and both seem to have similar structure. I tried removing unused and outdated settings from my project but that also had no effect. Is there an alternative to deleting my project file and adding the source files to it? I have a large project with multiple targets so that would be something I'd rather not do.

I am writing to report multiple issues encountered after updating to Xcode 26 Beta, which have significantly impacted my project's compilation and functionality. My project can run normally in Xcode16.3 version, Below are the specific problems, along with the steps I took to address them and the subsequent errors that arose: Symbol Not Found Error for _NSUserActivityTypeBrowsingWeb After updating to Xcode 26 Beta, my project failed to build with the error: "Symbol not found: _NSUserActivityTypeBrowsingWeb." To resolve this, I removed the MobileCoreServices framework from the Build Settings, as it appeared to be related. However, this led to a new error, indicating that this change introduced further complications. Clang++ Error: No Such File or Directory 'OpenGLES' Following the resolution of the first issue, I encountered a new error: "iOS clang++: error: no such file or directory: 'OpenGLES'." To address this, I added the OpenGLES.framework to the Build Phases. While this resolved the clang++ error, it triggered additional errors, suggesting that the underlying issue persists or new dependencies are conflicting. Recurring XIB File Compilation Errors My project uses XIB files, and every time I attempt to compile and run, Xcode reports errors related to different XIB files. Notably, when I open the reported XIB file, no errors are displayed within the Interface Builder. After saving or inspecting the file, the compilation error temporarily disappears, only for another XIB file to trigger the same issue in the next build. This creates a repetitive cycle. I have confirmed this is not a caching issue, as I clean the build cache (Product &gt; Clean Build Folder) before each run. If I skip cleaning the cache, the OpenGLES-related error (Issue 2) reappears, indicating potential interactions between these problems. These issues have made development with Xcode 26 Beta extremely challenging, as each attempted fix seems to introduce new errors, and the XIB issue creates a persistent loop. My setup includes: Xcode Version: 26.0 beta 2 (17A5241o) macOS Version:15.4.1 (24E263)

Hi, in our Xcode project we have a Tooling package, which defines build tool plugins for generating compile time safe constants for our localization strings as well as assets using swiftgen. This is working very well in Xcode 16, but fails in Xcode 26 beta 1 and beta 2 as well. The failure is specifically: unsupported configuration: the aggregate target 'Localization' has package dependencies, but targets that build for different platforms depend on it. I've reduced this to a minimal sample project, which you can find here.. To reproduce: Open the Repro workspace, that is attached in Xcode. Try to build TestyPackage. You'll see the error. I've filed this bug during WWDC week, but no feedback yet and no solution in Xcode 26 beta 2. Here's the feedback number, in case you have this too and want to file a duplicate: FB17934050. Does anyone else have this issue and perhaps a solution?

Any idea what this message means? I assume it's coming from CloudKit, but the application seems to store and retrieve data properly.

Can we use Icon Composer to drive an app icon for iOS 26 apps today? I get errors uploading a build to TestFlight internal testing about missing App icon dimensions for an iOS 26 app.

I’m trying to add my account to Xcode 16.1, which is running on a virtual machine with macOS Sequoia 15.1. I was able to successfully sign in to my account on the virtual machine itself. I’m using a Mac Mini M2, but when I attempt to add my account in Xcode, I encounter the following error: "There was a failure decoding response: (HTTP 401, 60 bytes) The data couldn’t be read because it isn’t in the correct format."

Since upgrading to Xcode 16, I've noticed that when I add new files to my local Swift packages, the "Update Package" option is no longer available when I right-click on my local package. In previous versions of Xcode, I used this feature to make Xcode recognize newly added files without any issues. Now, with Xcode 16, the only way I've found to get Xcode to recognize new files is to remove and re-add the entire package, which is obviously not ideal. I've tried cleaning the build folder and rebuilding the project, but it doesn't seem to help. Is there a new workflow or method in Xcode 16 to refresh or update local Swift packages without needing to remove and re-add them every time? Any suggestions or workarounds would be greatly appreciated! What I’ve tried so far: Cleaning and rebuilding the project Looking for any options under "File > Packages" menu Environment: Xcode 16 Local Swift Package Thanks in advance!

So I have a MacOS application that was working just fine before Xcode 16. The Widgets are not working anymore. The main application and the widgets share a file in a common App Group. The widget app now get a permission error when accessing the file. Also, the Widget Kit simulator keeps crashing. I also try to start a new project in Xcode, add a target with a Widget extension with an App Intent and run it, and it also crashes. Sometimes, it doesn't crash but just display the error: "Failed to load widget. The operation couldn't be completed. (WidgetKit_Simulator.WidgetDocument.Error error 2.). Edited to attach WidgetKit error log widgetKitError.txt

I'm trying to compile my iPad app with Xcode 16.2 and I'm consistently getting this error message: couldn't find compile unit for the macro table with offset = 0x0 This is happening at the GenerateDSymFile step. I've tried changing the debug format from Dwarf with Dsym to Dwarf and then back again, as I've read there was a problem with generating the dsyms. But the problem persists. I've tried searching for this error and found nothing online, so apparently I'm the only one! How strange. Are there any settings or flags I can change to try to get more information about what's going wrong?

I just want to rant why is Xcode such a bad ide and I wish Apple can do a better job on Xcode. Here's why: The preview is so slow. Most of the times it's just faster for me to test on a real device. It is so slow, and many times I need to force quite after it's being unresponsive for sometimes. When I'm working on larger projects, the loading time becomes extremely slow especially when there's other clients that might be reading the same files like a Git client or simply iCloud. The breakpoint is so slow. I don't know why, is it an iOS thing? But when I'm on ASP.Net the breakpoints are super fast. For Xcode it takes a long time to pause and show data. It's so big I don't know why it is so hard for Apple to make their ide better. The community has been unsatisfied with Xcode for a long time. There's many tricks on the internet that you can find to help you resolve some issues with your project that's actually related to Xcode. Instead of using these tricks, Apple should just fix these issues. Learn from Intellij!

I'm unable to reset simulators using the menu or the xcrun simctl tool: <output of xcrun simctl list> == Devices == -- iOS 17.5 -- iPhone SE (3rd generation) (5A06623A-173D-4C96-8DD3-3E9FE39A06F1) (Shutdown) iPhone 15 (iOS 17.5) (F4329E8D-29BB-4EA7-8465-C11A98D04ED7) (Shutdown) -- iOS 18.0 -- iPhone SE (3rd generation) (2DDE8F03-F8E1-4C1B-8E28-CD9B208F3FFA) (Shutdown) iPhone 16 Pro (DE788688-8AC6-40A0-B25C-A56AA423798E) (Shutdown) iPhone 16 Pro Max (1405184C-36A9-40F3-B0D0-4EEB88452883) (Shutdown) iPhone 16 (0CBBA7DB-B20E-4F17-BBC5-910F1F6E1A0A) (Shutdown) iPhone 16 Plus (95421C27-11A0-4FCF-A889-DAAE8557B271) (Shutdown) == Device Pairs == ~/Library`` ❯ xcrun simctl erase 0CBBA7DB-B20E-4F17-BBC5-910F1F6E1A0A An error was encountered processing the command (domain=NSCocoaErrorDomain, code=513): “data” couldn’t be moved because you don’t have permission to access “Deleting-8FEDFF47-5B2F-4534-BCA2-036BBE68CE37”. You don’t have permission. To view or change permissions, select the item in the Finder and choose File > Get Info. Underlying error (domain=NSPOSIXErrorDomain, code=1): The operation couldn’t be completed. Operation not permitted Operation not permitted Xcode Version 16.0 (16A242d) MacOS 15.0.1 (24A348)

Swift assist has been announced by apple this year. I have waited Xcode 16.2 release before posting this because I was still hopping for swift assist this year but apple DIDN'T release swift assist and they haven't post anything about swift assist reported or something... What's going to happen with swift assist? Coming next year?

I just downloaded Xcode26, and am trying to download the new simulator to be able to run and test my app. But the downloads folder just shows that it's stuck on "Fetching download information ..." even 15 minutes after it started. I tried restarting Xcode but didn't help. Internet connection is good. Any tips to get it working?

We have a tool in our CI which periodically updates our iOS project's Swift Package Manager dependencies. The script that does a few things, but generally speaking it first removes the existing package.resolved at ./ProjectName.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved and then runs: xcodebuild -resolvePackageDependencies -disablePackageRepositoryCache This regenerated the package.resolved file to reflect the latest, updated versions of the dependencies. It is the equivalent of doing Xcode > File > Packages> Update to Latest Package Versions. This has been working perfectly for a long time, but has stopped working since we moved from Xcode 15.4 to Xcode 16. I have also tested this with Xcode 16.1 and 16.2 - with no luck. I have tried running this command locally, and can confirm it is not an issue with the environment of our CI. I have also tried swift package update. Both of these commands appear to work - no errors are thrown, and the logs say "resolved source packages". However, they are not updating the packages. They are making no changes to the package.resolved file. However, using Xcode > File > Packages> Update to Latest Package Versions in Xcode 16 works as expected - the packages are updated and the .resolved file is updated. Is there now a different way to update Swift packages via the command line, or is this likely an Xcode 16 bug? Update: This feels broken, so I have submitted a Feedback Report (FB16108036) but perhaps someone can suggest a workaround for the time being!

I updated Xcode and MacOS recently and haven't been able to compile my Flutter app on iOS devices/simulators since then. The error keeps changing every time I run it but here's one of the output in the terminal after running flutter run: Uncategorized (Xcode): Command SwiftGeneratePch emitted errors but did not return a nonzero exit code to indicate failure Error (Xcode): no such file or directory: '/Users/chiragbhansali/Library/Developer/Xcode/DerivedData/ModuleCache.noindex/Session.modulevalidation' Error (Xcode): stat cache file '/Users/chiragbhansali/Library/Developer/Xcode/DerivedData/SDKStatCaches.noindex/iphonesimulator18.0-22A3362- db63dc9361471f152f572502bdbfe70a.sdkstatcache' not found Error (Xcode): unable to rename temporary '/Users/chiragbhansali/Library/Developer/Xcode/DerivedData/ModuleCache.noindex/3F9VRK3CXAUUD/UIKit-1KHQ7M05IF VXC-56601391.pcm.tmp' to output file '/Users/chiragbhansali/Library/Developer/Xcode/DerivedData/ModuleCache.noindex/3F9VRK3CXAUUD/UIKit-1KHQ7M05IF VXC.pcm': 'No such file or directory' Error (Xcode): could not build module 'UIKit' /Users/chiragbhansali/Chirag/Coding/Projects/app/test/build/ios/Debug-iphonesimulator/Flutter.framewo rk/Headers/FlutterAppDelegate.h:7:8 Error (Xcode): could not build module 'Flutter' /Users/chiragbhansali/Chirag/Coding/Projects/app/test/ios/Runner/GeneratedPluginRegistrant.h:9:8 Error (Xcode): failed to emit precompiled header '/Users/chiragbhansali/Library/Developer/Xcode/DerivedData/Runner-eifcguceazlwumgsyzegclqdrbqt/Build/Intermed iates.noindex/PrecompiledHeaders/Runner-Bridging-Header-swift_PB6A5GFLTNPC-clang_3F9VRK3CXAUUD.pch' for bridging header '/Users/chiragbhansali/Chirag/Coding/Projects/app/test/ios/Runner/Runner-Bridging-Header.h' Uncategorized (Xcode): Command PrecompileSwiftBridgingHeader emitted errors but did not return a nonzero exit code to indicate failure Uncategorized (Xcode): Command SwiftEmitModule failed with a nonzero exit code Uncategorized (Xcode): Command SwiftCompile failed with a nonzero exit code Could not build the application for the simulator. Error launching application on iPhone 16 Pro. What I have tried so far: Deleting iOS SDK and simulators Cleaning Xcode build cache using cmd+shift+k Creating a new Flutter project and trying to compile it (it failed so that reduces the chances of it being a Flutter issue) Clearing the DerivedData folder Clearing settings and cache of simulators Restarting laptop Versions: Xcode: 16.0 iOS: 18.0 MacOS: 15.1 (didn't work with 15.0 either) Flutter: 3.24

To reproduce this bug create a new Xcode Project for IOS choose UIKit. In the app delegate add the following lines. As you can see in the above image . Line 19 with the initialization of PHPickerViewController has no compilation failure. Now lets add import WidgetKit As soon as widgetKit is imported a compiler error is thrown which is PHPickerViewController is not in scope. This worked with Xcode 16.4 It was possible to have a swift file with both WidgetKit implementations and PhotosUI implementations. This behavior has changed in Xcode 26/26.0.1 . Does anybody know why this happens , could not find any clues within the different versions of documentations. P.S Found a work around which raises further questions Adding import SwiftUI fixes this problem , I am genuinely curious on how this is happening on a compiler level. LINKS To my previously published post :https://developer.apple.com/forums/thread/804059