“build disappears”

I’m blocked debugging a watchOS app on a physical Apple Watch. The iPhone connects to Xcode normally (wired), but the Watch either fails to connect with a tunnel timeout or disappears entirely from Xcode after I unpaired it inside Devices & Simulators. Environment Mac: macOS 26.x (Apple Silicon Mac) Xcode: 26.2 iPhone: iOS 26.1 Apple Watch Ultra: watchOS 26.2 (build 23S303) Connection: iPhone connected to Mac via USB (trusted). Watch paired to iPhone and working normally in the Watch app. Issue A (when Watch is visible in Xcode) In Xcode → Window → Devices and Simulators, the Watch shows up but is not usable and fails to connect. Error: “Previous preparation error: A connection to this device could not be established.” “Timed out while attempting to establish tunnel using negotiated network parameters.” In some attempts the Watch shows “Capacity: Unknown” / limited details, and then fails during preparation. Issue B (after unpairing Watch in Xcode only) I unpaired/removed the Watch in Xc

I have an app I am working on that makes a REST call, updates the UI with the info, and sends a notification. When I run Build and Run my app from Xcode using my iPhone as the destination, it works exactly as I want it to - my REST calls and notifications continue to work when the app is in the background. However, when I run my app that has been installed on my iPhone from the Xcode build/run directly (without Xcode in the picture), it does NOT behave correctly and only works when my app is in the foreground. What am I missing?

I've been trying to submit my iOS app for App Store review and keep getting a 409 error when clicking Add for Review in App Store Connect. The error appears in the console on appStoreVersions. Bundle ID: com.aigency.tabby Team ID: T8J2WDTJWB Everything is filled out — screenshots, description, pricing, privacy policy, build selected (Build 7, status Complete). The submission just fails silently with a red stop icon on the Save button and a 409 conflict on the API call. Called Apple Developer Support and was directed here. Is there a stuck submission on the backend that needs to be cleared? Any help appreciated.

Since I have changed of iPhone (yesterday) to run my draft application, I systematically, and instantaneously get a message The application failed to launch., i.e. the application successfully built and was downloaded to the new iPhone (Iphone 17 pro - iOS 26.4). I have checked that this new iPhone is well registered on my list of authorized devices. Could you help me to fix this issue ? Here is the verbose attached to the failure: The application failed to launch. Domain: com.apple.dt.CoreDeviceError Code: 10002 User Info: { BundleIdentifier = com.laurent-guise.ble-laser; DVTErrorCreationDateKey = 2026-03-30 07:59:46 +0000; IDERunOperationFailingWorker = IDELaunchCoreDeviceWorker; } The request to open com.laurent-guise.ble-laser failed. Domain: FBSOpenApplicationServiceErrorDomain Code: 1 Failure Reason: The request was denied by service delegate (SBMainWorkspace). User Info: { BSErrorCodeDescription = RequestDenied; FBSOpenApplicationRequestID = 0x3868; } The operation couldn’t be completed. The process fa

The title says it all, and I've filed FB FB22353950 that includes an Xcode 26.4 Screen Saver test project, QT movie demonstrating the error, and a PDF with complete steps to build and test. I'm asking here just to learn if this sounds familiar. The SS built on 26.4 fails in 26.4, works fine on 26.3.1. I'll supply the test files if there's interest. Thanks.

Reference: FB21797091 / Related to thread 807695 Hello, I have already submitted a report regarding this issue via Feedback Assistant (FB21797091), but I would like to share the technical details here to seek further insights or potential workarounds. We are experiencing a technical regression where Universal Links and Shared Web Credentials fail to resolve for Internationalized Domain Names (IDN) specifically on iOS 16 and later. This issue appears to be identical to the one discussed in thread 807695 (https://developer.apple.com/forums/thread/807695). Technical Contrast: What works vs. What fails On the exact same app build and iOS 16+ devices, we observe a clear distinction: Standard ASCII Domain (onelink.me): Works perfectly. (Proves App ID and Entitlements are correct) Internal Development Domain (Standard ASCII): Works perfectly. (Proves our server-side AASA hosting and HTTPS configuration are correct) Japanese IDN Domain (xn--[punycode].com): Fails completely. (Status: unspecified) Note: This

Hello Xcode 26.0.1 (17A400) Missing some Metal components When building a program using Metal, it induces an unexpected error : “error: error: cannot execute tool 'metal' due to missing Metal Toolchain; use: xcodebuild -downloadComponent MetalToolchain Command CompileMetalFile failed with a nonzero exit code” Which terminates the build The fix given “xcodebuild -downloadComponent MetalToolchain” using sudo does not work Did someone find a work around or could resolve the issue? Many thanks Jean MacBook Air M4; macOS 26.0.1; Xcode 26.0.1

I recently released version 8.5.4 (build 188) using Cloud Build. During testing via TestFlight, the app worked correctly on an iPhone 6 running iOS 12.5.8. However, after the app was published on the App Store, I found that the same version does not open at all on iOS 12 devices. Previously, earlier versions (such as 8.5.3) were functioning properly on iOS 12. My app’s minimum deployment target is set to iOS 12.0. This issue appears only with the App Store version, while the TestFlight version works fine on the same device. Due to this, I have paused the phased release of version 8.5.4 to prevent further impact on users still running iOS 12. I would like guidance on the following: 1. Has there been any recent change or limitation affecting apps targeting iOS 12 on the App Store? 2. Is there a way to prevent iOS 12 users from downloading version 8.5.4 while allowing them to continue using version 8.5.3? 3. Is there any recommended approach to ensure compatibility or restrict distribution base