After upgrading to macOS Tahoe 26.0.1, I encountered an issue where the debugger could no longer display standard C++ library types such as std::map, std::string, and other std:: containers. Instead, the debugger simply showed: Summary Unavailable 🧪 What I Tried • Switched from the default LLVM compiler to GDB to check if it was a debugger-related problem — no improvement. • Cleaned and rebuilt the project — the issue persisted. ✅ Solution Downgrading Xcode to version 16.4 immediately resolved the issue. According to Apple’s official Xcode support documentation, Xcode 16.4 is compatible with macOS Sequoia 15.6 and later, which includes macOS Tahoe 26.0.1. This suggests that the problem may be caused by a compatibility issue in the latest Command Line Tools bundled with newer versions of Xcode. 💡 Takeaway If you encounter the same problem: Try downgrading to Xcode 16.4 or reinstalling the corresponding Command Line Tools. Make sure your debugger (LLDB or GDB) is correctly linked to the appropriate SDK version. Hopefully this helps anyone experiencing the same issue!

I'm working in Xcode for the first time in over a decade (coming from VS Code and Zed), so bear with me on this one. I've just started up a new project and got things running, and I'm adding the following struct to my project: struct HttpRequest: Codable { let body: String? let headers: [String: String] let id: UUID let method: HttpMethod let url: String } The UUID type is from Foundation, of course. However, when I hit Ctrl+Space to auto-complete it, it says "Foundation is not imported." If I hit enter to select that entry, it does not auto-import Foundation, and gives me an error that it "Cannot find type 'UUID' in scope". I can click that error and it then click "import Foundation" to add the import, but this seems like a lot of effort just to "automatically" add an import that Xcode is already aware I need to add. On the other hand, I found a number of threads online during my search for answers that suggested I shouldn't even need this import, despite Xcode's insistence. TL;DR, my questions are: 1) Do I need the Foundation import to use UUID in Swift? and 2) If I do need it, how can I auto-import the Foundation module when I auto-complete the UUID type?

I have spent nearly an hour trying to get my iPhone 7 with iOS 15.8 to be recognized within xCode 26. I did not have this issue with the previous version of xCode. I have tried rebooting my Mac, rebooting my iPhone 7, removing the iPhone 7 from the list of devices that belong to my account, verified that I have support files for iOS 15.8 installed, signing out of my Apple account and signing back in....nothing works. Every time I go to "Windows > Devices" I see the iPhone 7, but I get a never-ending spinning circle next to the iPhone 7 (which is shown as connected) along with a banner that says "xCode will continue when Joe's iPhone 7 is finished." I can leave the phone connected to my Mac for an hour, and this message and the spinning circle next to the iPhone 7 never changes.

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

I have a mac mini on OS 15.7 ( Sequoia ) with 4-5 iPhone and iPad devices on version iOS 26.0 Stable connected to it. I am trying to build a device farm application where it run multiple UI tests to restore the device state but facing BUILD INTERRUPT intermittently during the UI test run. What can be the issue here? Is it device side issue OR issue with device and xcode connection. What tools can I use to gather more information of xcode and its processes or memory leaks due to it. Could any network call interruption via xcode can lead to this issue.

We have an iphone app that has an embedded webview using webkit, and we found the app crashes when we navigate to an specifc internal website. When I opened the ips file I see this stacktrace on the com.apple.main-thread WebCore::JSDOMRect::subspaceForImpl(JSC::VM&) WebCore::JSDOMRect::create(JSC::Structure*, WebCore::JSDOMGlobalObject*, WTF::Ref<WebCore::DOMRect, WTF::RawPtrTraits<WebCore::DOMRect>, WTF::DefaultRefDerefTraits<WebCore::DOMRect>>&&) WebCore::toJSNewlyCreated(JSC::JSGlobalObject*, WebCore::JSDOMGlobalObject*, WTF::Ref<WebCore::DOMRect, WTF::RawPtrTraits<WebCore::DOMRect>, WTF::DefaultRefDerefTraits<WebCore::DOMRect>>&&) JSC::JSValue WebCore::CloneDeserializer::readDOMRect<WebCore::DOMRect>() WebCore::CloneDeserializer::readTerminal() WebCore::CloneDeserializer::deserialize() WebCore::SerializedScriptValue::deserialize(JSC::JSGlobalObject&, JSC::JSGlobalObject*, WTF::Vector<WTF::Ref<WebCore::MessagePort, WTF::RawPtrTraits<WebCore::MessagePort>, WTF::DefaultRefDerefTrait WebCore::SerializedScriptValue::deserialize(JSC::JSGlobalObject&, JSC::JSGlobalObject*, WebCore::SerializationErrorMode, bool*) WebCore::SerializedScriptValue::deserialize(OpaqueJSContext const*, OpaqueJSValue const**) API::SerializedScriptValue::deserialize(WebCore::SerializedScriptValue&) ScriptMessageHandlerDelegate::didPostMessage(WebKit::WebPageProxy&, WebKit::FrameInfoData&&, API::ContentWorld&, WebCore::SerializedScriptValue&) WebKit::WebUserContentControllerProxy::didPostMessage(WTF::ObjectIdentifierGeneric<WebKit::WebPageProxyIdentifierType, WTF::ObjectIdentifierMainThreadAccessTraits<unsigned long long>, unsigned lon WebKit::WebUserContentControllerProxy::didReceiveMessage(IPC::Connection&, IPC::Decoder&) IPC::MessageReceiverMap::dispatchMessage(IPC::Connection&, IPC::Decoder&) WebKit::WebProcessProxy::dispatchMessage(IPC::Connection&, IPC::Decoder&) WebKit::WebProcessProxy::didReceiveMessage(IPC::Connection&, IPC::Decoder&) IPC::Connection::dispatchMessage(WTF::UniqueRef<IPC::Decoder>) IPC::Connection::dispatchIncomingMessages() WTF::RunLoop::performWork() WTF::RunLoop::performWork(void*) __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ __CFRunLoopDoSource0 __CFRunLoopDoSources0 __CFRunLoopRun CFRunLoopRunSpecific GSEventRunModal -[UIApplication _run] UIApplicationMain main start I assume something is crashing after deserializing a JSDomRect. This is crashing on an Iphone 13 with os 18.6.2 but this doesn't crash on iphone 11 os 26.0 I'm executing the app from xcode and I'm not able to see the stacktrace listed before in xcode, to be able to see variables and to understand what is being deserialized. I've also tried using safari mac develop, but safari stops debugging as soon as the app crashes. I've also tried attaching a remote process into the webkit I've downloaded from here https://webkit.org/getting-the-code/ but didn't have luck so far. Do you know how can I debug what's causing the crash?

developer disk image could not be mounted Error mounting image: 0xe800010f (kAMDMobileImageMounterPersonalizedBundleMissingVariantError: The bundle image is missing the requested variant for this device.)

I have added an in-app purchase function into my app, and have enabled in-app purchase profile in developer portal(it's on by default and is marked gray in developer portal, I don't know if that's how it supposed to look like). I have issued the agreements and tried signing the app both manually and automatically, but neither of that worked. App can be built successfully in simulator but does not show the simulation window, but cannot build on real device or archive. Errors: Missing com.apple.developer.in-app-purchase, com.apple.developer.in-app-purchase.non-consumable, and com.apple.developer.in-app-purchase.subscription entitlements. Automatic signing failed Xcode failed to provision this target.

Hi so i have a given project where I am trying to use components within the PhotosUI Framework with Xcode26 and Xcode26.0.1 Just for reference here is an attached screenshot This sample code compiled successfully with xcode16.4 and was in production. There is no change in the pbxproj file , all the build settings have remained the same. Attaching it for reference. project.pbxproj.txt While showing declarations of PHPickerViewControllerDelegate i get two options which is the same as in Xcode16.4 while browsing online found this reddit thread which is very similar https://www.reddit.com/r/Xcode/comments/1nkku20/my_project_wont_compile_after_xcode_26_update_due/ Pls help :)

I have an early-stage framework project where the Xcode project directory is named HXiMateSDK. When I switched to a new Mac device, the framework compiled using the newly installed version of Xcode failed to compile in the old version of Xcode on the old machine. My clients might use my framework in different Xcode versions, so I need to resolve this issue. STEPS TO REPRODUCE The built product HXiMateSDK.framework from the new machine A, which was compiled using the latest Xcode version 26.0.1 (17A400). When creating a new project justTestNew on the new machine A using the latest Xcode version 26.0.1 (17A400), calling the method getSDKVersion from the HXiMateSDK.framework compiles successfully. When creating a new project justTestOldEnv on the old machine B using Xcode 13.2.1 (13C100), calling the method getSDKVersion from the HXiMateSDK.framework results in a compilation failure.

Hello! Ive been working on a package tracking app for iOS and was looking forward to pushing it to TestFlight for some testers to use. When I go to archive the package, I get a warning about the "...TrackerIntents.appex is an ExtensionKit extension and must be embedded in the parent app bundle's Extensions directory, but is embedded in the parent app bundle's Tracker.app/Extensions directory". The extension is for siri integration with shortcuts. I have done quite a lot of things to try and diagnose this but cant seem to get passed this warning. I know it's a warning but would rather it not exist. Ideally I would think its a matter of "moving" the items but in the navigation area, I dont see an extensions area. The main app target has it in the dependencies along with the EmbedExtensionKit Extensions in the Build Phases. Any ideas or configs I can try? I can provide more information if needed. This is on the latest Xcode version 26.0.1 for iOS 26. Thank you.

Hi everyone, I created my app icon using Apple’s Icon Composer tool, a single AppIcon.icon file, set the iOS and Mac Catalyst using shared mode. There’s no AppIcon imageSet in Assets.xcassets. The app displays the icon correctly at runtime — both on iOS devices and on macOS (Catalyst build). On macOS versions prior to 26, the App Store icon looked completely normal. However, in App Store Connect and in the Mac App Store on macOS 26, the icon appears with a gray border. Thanks in advance for any insights or suggestions!

I'm working on moving XCTests to Swift Testing and trying to understand why it shows Testing Library Version: 102 (arm64-apple-ios13.0-simulator) when running. Why iOS 13?

When I start a Simulator (iPhone 13 mini) with iOS 26 and activate "Use the Same Keyboard Language as macOS", it still sets the keyboard to US (my Mac keyboard is in German). This makes the Mac keyboard unusable. It looks like a bug, because it clearly ignores the settings. When I type “@”, I get “¬”. Restarting the simulator did nothing, changing the settings back and forth also. BTW: Why does every single update of XCode come with a bug nowadays? I always have to spend half a day after an update to fix a problem I didn't have before. Highly frustrating.

Hi, I built my app using vs code, how can I open/import to Xcode? The app is a simple game app.

For the last week, every Update to Latest Package Version ends with the error fatal: unable to access 'https://github.com/firebase/firebase-ios-sdk/': Failed to connect to github.com port 443 after 31891 ms: Couldn't connect to server. This could be firebase-ios-sdk or another package. The timeout in the example given is 31,891 ms, but it could be more than 75,000 ms. However, other packages from GitHub are updated without errors. The next attempt may return the same error with the same repository, or with a different one, while the repository from the previous attempt is updated normally. This only happens in Xcode; pure Git performs clones (with and without mirrors), fetching, pulling, and any other actions permitted without any error. What happened, and how can I restore normal package management? MacOS 26.0.1 xcode 26.0.1

The following C code shows different results when build in debug or release mode with Xcode 26.0.1. #include <stdio.h> static void print_fval(int16_t *src) { float fval = (float)((((int32_t)*src) << 16) - (1 << 31)); printf("fval: %f\n", fval); } int main(int argc, const char * argv[]) { int16_t i16[1] = { 0 }; print_fval(i16); return EXIT_SUCCESS; } In debug mode the output is: fval: -2147483648.000000. In release mode the output is: fval: 2147483648.00000. The 1 << 31 might be questionable but I would expect the same outcome in debug or release mode. The difference is in compiling with optimizations or not, compiler option -O0 vs any other optimization option. Would this be considered a compiler/optimizer bug? Older versions of Xcode (15.4 and earlier) do not have this problem.

Hi, It seems that the files that are added to a targets compilation list cannot be hardcoded. If the file doesn't exist in the file system then it cannot be added to the compilation list. If this is true then how are autogenerated files handled in Xcode. I want to autogenerate some code but since I can't add those files in to the project, the first compilation (that generates those files) always fails. This is especially problem in CI. How is I should handle this in Xcode

SceneDelegate's sceneWillEnterForeground and sceneDidEnterBackground methods are not called when app is moved to the background and back. It happens when Stage Manager is enabled and application is moved to the background using App Switcher (double tap on the home button). Otherwise methods are called. Started to reproduce since iOS26. Is not reproducible on iOS18.

I'm facing a build failure after migrating my project to Xcode 26. The issue appears to be related to the redefinition of some core system types. The compiler errors point to a failure to locate the original type definitions, suggesting they've been moved or renamed. Specifically, the build log contains these errors: ../arm64-apple-ios.private.swiftinterface:653:11: Cannot find type '_sys_select' in scope ../arm64-apple-ios.private.swiftinterface:130:33: Cannot find type 'netinet_in' in scope I've observed that the types are being mapped as follows: netinet_in.in_addr_t -> _DarwinFoundation2.in_addr_t _sys_select.fd_set -> _DarwinFoundation2.fd_set I'm looking for guidance on the recommended way to resolve these API changes. How should I handle these type redefinitions in Xcode 26 to ensure my project builds correctly? Any insights would be greatly appreciated. Thank you.