Xcode 26.3 MCP xcode-tools: RunSomeTests / RunAllTests response violates tool output schema (missing required errors per test) I’m using the MCP server “xcode-tools” shipped with Xcode 26.3 to run tests. Two tools fail consistently due to a schema mismatch: RunSomeTests RunAllTests Steps Call XcodeListWindows and get a valid tabIdentifier for my workspace. Call GetTestList with that tabIdentifier. This works and returns test identifiers like: ChatKitManagerCreationTests/testInitializesWithDependencies() Call RunSomeTests with tests = [{ targetName, testIdentifier }, …] (or call RunAllTests). Actual result The tool call fails with an MCP schema validation error like: Structured content does not match the tool's output schema: data/results/0 must have required property 'errors', data/results/1 must have required property 'errors', ... Why this looks like an xcode-tools bug According to the tool descriptor JSON for RunSomeTests / RunAllTests, each element of results[] is required to contain: targetName identifier displayName state errors (required, array of strings) But the actual response returned by RunSomeTests / RunAllTests appears to omit the errors field for one or more results (for passed tests it should still be present as an empty array []). Expected result RunSomeTests / RunAllTests always return structured content matching their declared output schema. In particular, every results[i] should include errors: [] when there are no errors. Environment Xcode: 26.3 macOS: Darwin 25.4.0 Workspace: Grocery.xcworkspace Scheme: GroceryCoreTests Active test plan: GroceryCoreTests Question Is this a known issue in Xcode 26.3’s MCP xcode-tools? Is there a workaround (e.g. alternative output mode, or reading a full summary file) until the schema/response is fixed?

On watchOS, the Developer Mode entry under Settings -> Privacy & Security is hidden by default and only appears after Xcode has attempted to connect to the watch as a development device. In my case, once Xcode triggers that surfacing, opening Settings -> Privacy & Security on the watch prompts for a 4-digit Screen Time passcode before granting access. No Screen Time passcode I set on the paired iPhone is accepted at this prompt, which prevents me from reaching the Developer Mode toggle to enable it. The passcode prompt only appears in this specific state. With no Xcode connection attempt (and therefore no Developer Mode entry surfaced in the menu), Settings → Privacy & Security opens normally on the watch with no prompt at all. Environment macOS: Tahoe 26.4.1 (Build 25E253) Xcode: 26.4.1 (24909.0.3) (Build 17E202) iPhone: iOS 26.4.2 Apple Watch: Ultra 3 running watchOS 26.4 All devices on release software (no betas). Xcode error Developer Mode disabled Domain: com.apple.dt.deviceprep Code: -28 Recovery Suggestion: To use [Watch Name] for development, enable Developer Mode in Settings → Privacy & Security. User Info: { DVTErrorCreationDateKey = "2026-04-30 09:38:57 +0000"; "com.apple.dt.DVTCoreDevice.operationName" = checkDeveloperMode; } Reproduction Pair Apple Watch to iPhone (paired fresh, set up as new, not restored from backup). Connect iPhone to Mac running Xcode 26.4.1. Before any Xcode connection attempt, open Settings -> Privacy & Security on the watch. The menu opens normally with no passcode prompt. There is no Developer Mode entry visible. In Xcode, attempt to use the Apple Watch as a run destination. Xcode returns the -28 / Developer Mode disabled error above and instructs me to enable Developer Mode in Settings -> Privacy & Security on the watch. After this attempt, the Developer Mode entry is surfaced in Settings -> Privacy & Security on the watch. Open Settings -> Privacy & Security on the watch in this surfaced state. The menu now prompts for a 4-digit Screen Time passcode before allowing access. The passcodes I have set on the paired iPhone are rejected. The passcode prompt is therefore conditional on the Developer Mode entry having been surfaced by a recent Xcode connection attempt. In step 3 (no surfacing) the menu opens freely; in step 6 (surfacing in effect) the menu is gated. What I have already tried Confirmed Screen Time is disabled on the paired iPhone. Confirmed Share Across Devices is enabled. Confirmed Content & Privacy Restrictions is off on the iPhone. Confirmed I am an adult in my Family Sharing group (not a managed/child account). Confirmed there are no configuration profiles installed (Settings -> General -> VPN & Device Management is empty). Set a fresh Screen Time passcode on the iPhone. Not accepted by the watch prompt. Used Forgot Passcode? → Apple ID authentication to reset the Screen Time passcode and set a new one. Not accepted by the watch prompt. Turned the Screen Time passcode off entirely on the iPhone. The watch still prompts for one when Xcode is connecting. Unpaired the Apple Watch and re-paired as new (not restored from backup). Issue persists. Tried entering the watch's own device passcode at the prompt. Not accepted. Question What credential is the watch's Privacy & Security menu actually checking against once the Developer Mode entry has been surfaced, and how can it be reset or cleared from a paired iPhone? Is anyone else seeing this conditional gating where the menu is only locked in the post-surfacing state? Any pointers from the Xcode / watchOS tools team would be appreciated. Happy to provide sysdiagnose or further details on request.

I am developing an iOS app using Capacitor and Xcode. The app installs on my device but fails to launch with the error: “Quarantined due to high logging volume.” I have already: Configured signing correctly Enabled Developer Mode Disabled excessive logging in the app code Cleaned build and re-synced Capacitor The app still fails to run on a physical device (My iPhone 17Pro Max). Please advise on how to resolve this issue or whether this is related to a system-level logging limit or WebView restriction. Please suggest a reliable solution to the issue.

I cannot distribute an app on xcode becouse he cannot find a certificate valid for my personal or business team. Need to address XCODE to access to my business account and not personal

Hi everyone, I'm unable to use the po or v commands in the LLDB debugger in a fresh new iOS project (but works in my existing projects). I'm using Xcode 26.2 (17C52). I tried solving the issue with various AI tools for hours but had no success. The community is truly irreplaceable.

It would be helpful if the required token scopes were pre-filled in the URL when clicking the "Create a Token on GitHub" button when signing into a GitHub account in Xcode. FB22632532 https://github.com/feedback-assistant/reports/issues/796

Xcore 26.2 run on newly installed macOS 15.7.3 (24G419) crashes when attempting to build assets backtrace

There are multiple iOS simulator runtimes located at /System/Library/AssetsV2/com_apple_MobileAsset_iOSSimulatorRuntime which I don't need. I tried the following approaches to delete them but not working. Xcode > Settings > Components > Delete (It can delete some but not all of them) xcrun simctl runtime list (It doesn't show the old runtimes) sudo rm (Operation not permitted) sudo rm -rf cc1f035290d244fca4f74d9d243fcd02d2876c27.asset Password: rm: cc1f035290d244fca4f74d9d243fcd02d2876c27.asset/AssetData/096-69246-684.dmg: Operation not permitted rm: cc1f035290d244fca4f74d9d243fcd02d2876c27.asset/AssetData: Operation not permitted rm: cc1f035290d244fca4f74d9d243fcd02d2876c27.asset/Info.plist: Operation not permitted rm: cc1f035290d244fca4f74d9d243fcd02d2876c27.asset/version.plist: Operation not permitted rm: cc1f035290d244fca4f74d9d243fcd02d2876c27.asset: Operation not permitted I have two questions: Why "xcrun simctl runtime list" is unable to list some old runtimes? How to delete them?

Hey, im running a MacBook Pro m2 26.4.1 and Xcode 26.4. I'm trying to upload to App Store Connect and it's getting stuck on "Sending analysis to App Store Connect".... now what's interesting my Mac mini m4. same iOS works fine? Any ideas

Hi everyone, yesterday I updated my macOS and Xcode to the latest versions and today I have the strangest thing: Canvas is always crashing whenever I click it, in any and all my Projects. The full Simulator works just fine; only the Preview Canvas crashes. All the crash reports say it's because of AXRemoteElement-BackgroundFetch, and ChatGPT says it's not because of my code. These are very simple Projects, just for experimentation. Nothing complex, just native code while I follow examples in a SwiftUI book. Anyone else having this issue? Translated Report (Full Report Below) ------------------------------------- Process: PreviewShell [2179] Path: /Volumes/VOLUME/*/PreviewShell.app/PreviewShell Identifier: com.apple.PreviewShell Version: 16.0 (23.40.29) Code Type: ARM-64 (Native) Role: Foreground Parent Process: launchd_sim [1405] Coalition: com.apple.CoreSimulator.SimDevice.E9525D59-3C07-43F9-ACC9-18CF5DD0DAA1 [1516] Responsible Process: SimulatorTrampoline [1120] User ID: 501 Date/Time: 2026-03-26 15:00:02.6060 +0200 Launch Time: 2026-03-26 14:57:33.8870 +0200 Hardware Model: Mac17,9 OS Version: macOS 26.4 (25E246) Release Type: User Crash Reporter Key: 1DC4EA68-804A-D651-804B-C2E0C13D9B87 Incident Identifier: F3F1A52F-AFF9-4470-A216-7364FCB5B7E6 Time Awake Since Boot: 1100 seconds System Integrity Protection: enabled Triggered by Thread: 4, Dispatch Queue: AXRemoteElement-BackgroundFetch Exception Type: EXC_BAD_ACCESS (SIGBUS) Exception Subtype: KERN_PROTECTION_FAILURE at 0x000000016b6bfff0 Exception Message: Could not determine thread index for stack guard region Exception Codes: 0x0000000000000002, 0x000000016b6bfff0 Termination Reason: Namespace SIGNAL, Code 10, Bus error: 10 Terminating Process: exc handler [2179]

Hello! Every time I attempt to enroll into the program I get hit with one of the following two errors: Unknown Error Please try again. Apple ID Issue The region of the Apple ID that's signed in to Settings or System Preferences is different than the region of the Apple ID with which you signed into the Apple Developer app. Sign in to Settings or System Preferences with an Apple ID that has the same region. I’m very confused by this message because I have never changed the region of my Apple ID - it should be United States. How can I complete my enrollment?

Pulling my hair out here. After upgrading to Xcode Version 26.4.1 (17E202) I've started getting "unable to create tasks to copy stub binary: can't determine architectures of binary: /Applications/Xcode.app/Contents/Developer/Platforms/WatchSimulator.platform/Library/Application Support/MessagesApplicationStub/MessagesApplicationStub: Cannot open file handle for file at path: /Applications/Xcode.app/Contents/Developer/Platforms/WatchSimulator.platform/Library/Application Support/MessagesApplicationStub/MessagesApplicationStub: The file “MessagesApplicationStub” doesn’t exist." No matter what I do when trying to run the build (worked in previous versions). I've tried fresh install from App Store, direct package download, removing the SDKs, even previous versions and no matter what I get

Hello everyone. I need help! I'm using Xcode solely to create an archive of a mobile application created with WinDev Mobile. When everything is working correctly, I simply retrieve the application's generated version from WinDev Mobile, launch the archive creation process, and add a new version to TestFlight! Then I can test the application on the iPhone. The current problem is that the application crashes, without any error message, in a specific use case. Hoping to get some help with this crash, I had the idea to test the application using Xcode. Once launched, a crash occurs if I follow the same process. There's an error message, which I'll paste below. What does this error mean? How can I relate it to my WinDev Mobile code? Have a good day.

My app start up has became horrid. It takes 1 minute to open SQLlite database for my rust core. Impossible to work... I have Address Sanitizer, Thread Perf Checker and Thread Sanitizer disabled...

My Claude Agent component version was 2.1.81, it prompted me for an update the other day from the original release version 2.1.59. But now that I've installed Xcode 26.4.1 it's back to thinking 2.1.59 is the newest version. With every Xcode release it feels like there's a new regression or weird surprise with coding intelligence (26.4 was Claude losing its OAuth token every 8 hours or so). It really feels like this stuff needs more eyes on it. Filed as FB22529202

Translated Report (Full Report Below) Process: Xcode [3078] Path: /Applications/Xcode.app/Contents/MacOS/Xcode Identifier: com.apple.dt.Xcode Version: 26.4.1 (24909.0.3) Build Info: IDEApplication-24909000003000000~2 (17E202) Code Type: ARM-64 (Native) Role: Default Parent Process: launchd [1] Coalition: com.apple.dt.Xcode [1424] User ID: 501 Date/Time: 2026-04-24 17:26:21.8348 +0800 Launch Time: 2026-04-24 17:26:21.7161 +0800 Hardware Model: MacBookPro18,1 OS Version: macOS 26.5 (25F5058e) Release Type: User Crash Reporter Key: 7A149229-7AEE-0654-7878-1A66190C590A Incident Identifier: AC932530-5FCF-45B1-90F3-D26B40150344 Time Awake Since Boot: 3400 seconds System Integrity Protection: enabled Triggered by Thread: 0, Dispatch Queue: com.apple.main-thread Exception Type: EXC_BAD_ACCESS (SIGKILL (Code Signature Invalid)) Exception Subtype: UNKNOWN_0x32 at 0x0000000112948000 Exception Codes: 0x0000000000000032, 0x0000000112948000 Termination Reason: Namespace CODESIGNING, Code 2, Invalid Page

EXC_BAD_ACCESS (SIGKILL (Code Signature Invalid)) Crash Report

I have an iOS project based on SwiftUI in which almost all code is organised in Packages. With Xcode 26.2 and 26.3, I can preview all SwiftUI views without issues. With Xcode 26.4, the same previews don't work, in the canvas appears this error message: "Cannot preview in this file. Could not find target description for “TaskListView.swift”". The explanation is: "The list of source files that produce object files did not contain this file to be previewed. Check to make sure it is not excluded using the EXCLUDED_SOURCE_FILE_NAMES build setting." If I add a SwiftUI view to the main project files (not in a package), the preview works as expected. Is it an Xcode 26.4 regression? Or do I need to modify some configuration file?

Dear all, I am not able to transfer a programm to my iPhone 17, i get a certificate issue. Although i followed the general steps. If I was guided to this forum by the german apple support. Before in macOS Sonoma, with iOS 16 and iPhone 8 i have been able building programs for the iPhone. The Simulator has still no issues and works fine. Problem/Error: Certificate installation failed Installing a certificate in the keychain failed (Error Domain=DVTSecErrorDomain Code=-25295 "The specified keychain is not a valid keychain file." UserInfo={NSLocalisedDescription=The specified keychain is not a valid keychain file.}) No profiles for '-.delme2' were found Xcode couldn't find any iOS App Development provisioning profiles matching '-.delme2'. Furthermore, when I try to download a certificate myself via (https://developer.apple.com/account/resources/) I get the error: Unable to find a team with the given Team ID 'XXXXXXXCENSORED' to which you belong. Please contact Apple Developer Program Support. https://developer.apple.com/support In XCode I continue to receive the following information: So no programs can be transferred to my mobile phone. Objective: How do I get the reported errors resolved to transfer programs to my mobile phone?

Since 26.4 beta 3 I've been having errors after a few hours of using Claude Agent. I get an error stating that I am not authed. If I go into Xcode settings, it still shows I am signed into Claude Agent. I have click sign out and then go through the whole auth process again to start using the agent again. This is on two separate computers. Is there anything I can do to stop this behaviour and stay logged in for longer? It worked fine in 26.3.