I have two apps; one is a subset of functionality of the other. The smaller app has about 170 Swift files. The larger app has these files plus about 120 more. So I would expect the larger app to take around twice as long to build. Instead, the smaller app takes less than a minute to build while the larger app takes over 13 minutes to build; to be exact, it takes 15.3 times longer. While reviewing the build report, I noticed that the smaller app compiles the Swift files in batches, with each batch taking around 10 seconds, but with up to 17 batches running at once. In contrast, the larger app compiles all 290 Swift files in one giant batch, so apparently there is no multithreading of the Swift compilation (see screen shots below). The difference in the number of batches the smaller app compiles at once roughly corresponds to the difference in overall build time. Is there a build setting I can change to make the larger app compile Swift files in multiple smaller batches as the smaller app is doing? I checked SWIFT_COMPILATION_MODE and it's the same in both apps (Incremental for debugging and Whole Module for release) but I don't know what other settings I should check.

I see a lot of posts about things that need fixing and it looks to me like you all need the help if there’s anything I can do please let me know I know what I can do for you so what could you do for me I’m looking to join your team and help you fix some issues your having maybe an internship or even a developer position either way you could get your money with depending on how well you pay

Whenever I click the blue project button below for my ios application (in an attempt to get to Signing & Capabilities), my Xcode application crashes. I've tried the following: Deleting xcuserdata folder under project.xcworkspace Purging derived data in ~/Library/Developer/Xcode/DerivedData Clearing Xcode preferences with defaults delete com.apple.dt.Xcode

Hi everyone, I downloaded Xcode 27.0 today because I need the Metal Toolchain for Unreal Engine 5.6 on my Mac. Xcode itself is installed and working, but Unreal is having issues because the Metal Toolchain doesn't seem to be installed. When I run: xcrun metal --version I get: error: error: cannot execute tool 'metal' due to missing Metal Toolchain; use: xcodebuild -downloadComponent MetalToolchain I tried: sudo xcodebuild -downloadComponent MetalToolchain but it just stays on: Beginning asset download... If I cancel it, I get: xcodebuild: error: Download was cancelled. (Asset download for com.apple.MobileAsset.MetalToolchain ...) I've also run: xcodebuild -runFirstLaunch and installed the latest Command Line Tools for Xcode 27.0 through Software Update. xcrun --find metal does find the executable, but the actual Metal Toolchain appears to be missing. I'm mainly trying to get this working so I can use Unreal Engine 5.6. Has anyone had this issue with Xcode 27, or know the correct way to install the Metal Toolchain when xcodebuild -downloadComponent gets stuck at "Beginning asset download"? Thanks!

I have a problem downloading Xcode components like Metal Toolchain or Developer Documentation. The action stuck with the status "Preparing to download". The symptoms started several weeks ago. I noticed this when my copy of Xcode 27 beta stopped showing the developer documentation. Strangely, when I re-launched Xcode it insists to download the Developer Documentation and keep showing "Preparing to download" while other components like Metal Toolchain, when I quit Xcode, it cancels the component download and that component status reverts to "Get". The symptoms continue thru the released version of Xcode27. Does anyone know the cure?

I have been struggling with this for a while and have gone through every solution I have found on the forums, so I am hoping someone at Apple or in the community can shed some light on the actual root cause. Setup Mac: macOS 26.7 (Build 25G229) Xcode: 26.2 (Build 17C52) — also tried 16.8 and 26.0, same result Device: iPhone SE (3rd generation), iPhone14,6 — iOS 26.7 (Build 23H24) Developer Mode: enabled on device Pairing state: paired, tunnel connected The error When I connect my iPhone via cable, Xcode initiates pairing and device preparation, then immediately fails with: The developer disk image could not be mounted on this device. Domain: com.apple.dt.CoreDeviceError Code: 12040 Failure Reason: Unable to find a valid DDI for the iOS platform. Run 'devicectl list preferredDDI' from the command line to get more details. User Info: { DVTErrorCreationDateKey = "2026-09-22 17:14:25 +0000"; DeviceIdentifier = "3B75FE83-5833-53B2-8ABE-9AA65A22A1C8"; "com.apple.dt.DVTCoreDevice.operationName" = enablePersonalizedDDI; } Underlying errors: Code 12001 — Unable to find a valid DDI for the iOS platform. Code 12007 — Unable to find a developer disk image to use for the iOS platform (variants: Internal, Public). Diagnosing: no DDIs found for any platform Running the suggested command: xcrun devicectl list preferredDDI Output: Failed to load provisioning parameter list due to error: Error Domain=com.apple.dt.CoreDeviceError Code=1002 "No provider was found." UserInfo={NSLocalizedDescription=No provider was found.} Host CoreDevice version: 518.27 WARNING: No DDI was found for the iOS platform. No DDI was found for the macOS platform. No DDI was found for the tvOS platform. No DDI was found for the watchOS platform. No DDI was found for the visionOS platform. The key signal here is Code=1002 "No provider was found." — this same error appears as a prefix in every devicectl command I run, regardless of the subcommand. I suspect this is the actual root cause, not a secondary issue. Additionally, /Library/Developer/DeveloperDiskImages does not exist on this machine. What I have already tried xcrun devicectl manage ddis update Updating host DDIs at /Library/Developer/DeveloperDiskImages The following directories provided candidate DDIs: /Library/Developer/CoreDevice/CandidateDDIs /Applications/Xcode-26.2.0.app/Contents/Resources/CoreDeviceDDIs After cleaning and updating the installed host DDIs in /Library/Developer/DeveloperDiskImages are equivalent to the original set. The command completes without error, but /Library/Developer/DeveloperDiskImages is still never created. Reinstalling Xcode system resources: sudo installer -target / -pkg $(xcode-select -p)/../Resources/Packages/XcodeSystemResources.pkg No change. Multiple Xcode versions — tested with 16.8 and 26.0 in addition to the current 26.2. Same failure across all. Multiple iOS versions on the device — the iPhone has been factory reset several times and tested on different iOS 26.x builds as Apple released them. Issue persists on all versions. Confirmed xcode-select -p points to the active Xcode installation and xcrun resolves tools correctly. Device info (for reference) xcrun devicectl list devices Name Identifier State Model iPhone de Carlos 3B75FE83-5833-53B2-8ABE-9AA65A22A1C8 connected (no DDI) iPhone SE (3rd generation) The device pairs and tunnels fine. The only blocker is DDI services (ddiServicesAvailable: false). Questions What does Code=1002 "No provider was found." actually mean in the context of devicectl? Is there a provisioning service or entitlement missing on the Mac side? Why does devicectl manage ddis update report success but never create /Library/Developer/DeveloperDiskImages? Is there a prerequisite directory or permission that needs to exist first? Is there a way to manually force-install the DDIs from the Xcode bundle, bypassing the update mechanism? Any guidance would be greatly appreciated. Happy to run additional diagnostics if needed.

In process of creating an iOS app and installed Xcode 27, now when I add a simulator in the Device Hub the iOS version needs to be 27 or I get an incompatible version error. Also when I select the top app icon the tabs such as the build settings is not showing, only the non-modifiable text file. I'm sure the fix for both is simple but I need pointed in the right direction.

Circling back on the LocalLM Lab arc. With v0.7, we've moved from prompt experimentation into real app development on Apple's Foundation Models local AI. The LocalLM Lab SDK lets you build that same on-device model and MCP client this thread has covered directly into your own app, with real tool and data access (Slack, Todoist, GitHub, Notion, Linear, plus Calendar, Reminders, Contacts and Location). And you can ship your app including through the Mac App Store. This is a big improvement over version 0.6, where the localai-cli toolkit needed LocalLM Lab installed and running. On the other hand, the SDK (LocalLMLabSDKCore) doesn't relay through anything; it links FoundationModels and a real MCP client directly into your own binary and is totally self-contained. The example included in the SDK, Plate Today, has actually been built into a sandboxed test app and verified working, with a signed path to a Mac App Store .pkg (Apple Distribution signing + provisioning profile pipeline). That's "verified signable and sandbox-compatible," to be precise. Entitlements (from personal experience: always a complicated topic): com.apple.security.app-sandbox + com.apple.security.network.client for the app itself, plus the standard personal-information entitlements per connector used (com.apple.security.personal-information.calendars, .addressbook, .location) and matching NS*UsageDescription strings in Info.plist. The one worth flagging specifically: the network entitlement is easy to miss and fails silently rather than throwing. Without it, MCP connections and Weather calls just hang with no error surfaced. OAuth handling requires the app delegate callback (application(_:open:)), not SwiftUI's .onOpenURL. Worth knowing before wiring it up if you're SwiftUI-only. Full entitlements list + SDK guide: https://github.com/ancientcomputing/locallm/blob/main/docs/sdk-guide.md Feature page: thisbrain.ai/locallm/sdk.html I hope the availability of the SDK (free, Apache 2.0 license) will give folks further incentive to explore local AI-enabled applications on the Mac. What else would you want to do that the SDK doesn't currently support? File picker? Calendar/Reminders/Contacts edits & writes?

Why doesn't iPhone 13 Pro Max and Watch Series 11 not connect to Xcode 27.0? Something is wrong and I cannot vet the application before submitting for App Store.

Hello Apple Developer Support, I am requesting assistance with our Apple Developer Program enrollment migration from an individual account to an organization account, which has been stuck for [X months]. Enrollment ID: V5J8249V5Q Organization: TutorCloud Technology Limited Original individual account: Anirudh Baheti Status shown: "Your enrollment is being processed" Timeline: Migration request submitted-3 months back Multiple phone calls and emails with Developer Support since last three months with no clear path forward or explanation of what is outstanding No specific blocker has been communicated to us despite repeated follow-up We urgently need this resolved as we have an app ready for immediate deployment and are fully blocked from publishing. Could an Apple Developer Support representative please review Enrollment ID V5J8249V5Q and advise: What specifically remains outstanding for this migration Whether any document or confirmation from our side is pending An estimated timeline for resolution Thank you for your help.

Hi everyone, I'm looking for advice from developers who have dealt with Guideline 4.3 in a situation involving a previously terminated Apple Developer account. We have a legitimate travel booking application that was previously submitted to the App Store under our original Apple Developer account. Unfortunately, that developer account was terminated, and despite multiple appeals/support requests, we were unable to have the account restored. We subsequently created a new Apple Developer account and attempted to submit the same legitimate travel application under the new account. The current application has a significantly redesigned UI and UX, but the mobile application is still based on the original React Native codebase. The backend, APIs, travel integrations, booking system, etc. are our existing platform and are not copied from another application. The submission is now being rejected under Guideline 4.3 with wording indicating that the app shares a similar binary, metadata, and/or concept with apps previously submitted by a terminated Apple Developer Program account. My question is specifically about understanding what Apple may be identifying in this situation. Has anyone experienced a similar case where: The same legitimate product was previously submitted under a terminated developer account. The developer then had to submit it from a new account. The new submission was rejected under 4.3 because of its relationship to the previous app/account. If so, were you able to determine whether Apple's concern was primarily: the binary/source-code similarity, the previous developer account association, metadata/assets, or the fact that it was essentially the same product? I'm considering rebuilding the iOS client from React Native to Flutter as a genuinely new implementation while keeping our existing backend/API platform. Before investing significant development time in that rewrite, I'd like to understand whether changing the mobile technology would actually address this type of 4.3 issue, or whether the previous account association can still cause the rejection regardless of the framework. I'd also appreciate any experience with getting a specific answer from App Review about what triggered the 4.3 rejection in cases involving a terminated account. Thanks in advance.

Anyone know if it is possible to run our app from Xcode 26.3, in an iOS 27 simulator? I see several are listed in the simulator-selection menu but thus far no luck building for them. Background: Trying to see what our app looks like in iOS 27 even before scene delegate migration is complete.

It has been two years since I wrote my a SwiftUI app, and I wanted to start again in Xcode 26. I can no longer see the attributes inspector when I select an element in the canvas. This was an Xcode feature that was very helpful as I am still a novice. Has this feature been deprecated in Xcode 26? And if not, please help explain how I can find and use it.

Good day, I'm trying to resolve the EU "Digital Services Act" compliance for my employer's Apple Developer account, but I'm stuck on verifying the phone number. The email verification code came through without any issue. We are located in South Africa, with a "+27" area code and the number I need to use here is a landline that comes through to the receptionist at our head office. This number does not have the ability to receive text messages, so I selected the "Didn't get a verification code?" link and chose the receive a phone call instead, however the call never comes through. Calling the number from my cellphone goes straight through to the receptionist, there are no digital switchboard prompts for the caller to select from. I tried this numerous times this Friday just past, and again twice now today, still no luck. I've requested an official document from my manager to see if I can go that route to verify the details, but so far nobody seems to be able to find an appropriate document for me to use... :( Is there anything else that I can do here?

Hi. On my iOS app, both the app store and the device are making changes to my app icon to make it look more Liquid-Glass. See attached image showing my original icon, and then how it appears on the app store and on devices. There is an added bevel/3d effect. I'd like to not have this happen. Did anybody figure out how to turn this off? So that the icon appears as submitted. I've played around with Icon Composer a bit but haven't managed to turn this off there. And would prefer to just submit the png's. Thank you!

My Apple Developer account was recently terminated, and I received an email stating that the reason was section 3.2(f) of the Apple Developer Program License Agreement. However, I have not changed anything recently in our apps, business model, or developer activity, and I genuinely do not understand the reason behind this termination. I have always tried to follow Apple’s guidelines carefully and act in good faith. This termination has severely impacted my work and users, and I am urgently requesting clarification regarding what exactly triggered this action. If someone from Apple or the App Review / Developer Relations team could please contact me or review the case again, I would greatly appreciate it. Thank you.

I am using Xcode 26.2, ProductBuildVersion 17C52. I read the xcodebuild(1) manual included with this installation. It describes -checkFirstLaunchStatus as checking whether additional system components or configuration tasks need to be performed, and says that it exits with 0 when system components are up to date. However, it does not explicitly state whether this result includes acceptance of the currently required Xcode and SDK license agreements. Does exit status 0 from: /usr/bin/xcodebuild -checkFirstLaunchStatus also confirm that the required Xcode and SDK license agreements are already accepted? If not, is there a supported, status-only command or user-interface location that reports whether those agreements are currently accepted, without accepting or reaccepting them, installing components, or running a build? Please clarify: The supported command or interface, if one exists. The meaning of its possible status results. Any required privileges. Whether invoking it can change any system or Xcode state. If no supported non-mutating method exists for checking license acceptance separately, please confirm that as well. I have reviewed the locally installed documentation but have not executed the proposed xcodebuild command.

Hi, I'm posting a boot crash here. Environment Hardware: Macbook M5 Pro OS Version: macOS 26.3.1 (25D2128) and matching version of KDK from official apple download page Kernel Version: Darwin Kernel Version 25.3.0 Reproducibility: Consistent Here is my panic log --- I truncated one field "SOCDNandContainer" as the original log is too long to post, hitting the size limit. I followed a blog post to boot the development kernel as the ReadMe file from KDK only contains instructions for Intel Macs. https://jaitechwriteups.blogspot.com/2025/10/boot-custom-macos-kernel-on-macos-apple.html I've tried a few 26.2 KDKs before 26.3.1 public launch, and they all showed same errors (26.1 and 26.0 KDKs don't have any development kernel for T8142 chip). Also, I own two fresh M5 Pro, and it is consistent across the machines. The highlight is panic(cpu 8 caller 0xfffffe0050e18010): [Exclaves] $JgOSLogServerComponent.RedactedLogServer.init(logServerNotific:OSLogServerComponent\/OSLogServerComponent_Swift.swift:815: Fatal error: invalid rawValue for TightbeamComponents.RedactedLogSer at PC ... Is this a genuine bug or am I following a wrong guide to boot the development kernel? I don't think the blog is wrong because I'm able to boot the "release" kernel included in the KDK on the same M5 Pro, and the "development" kernel on M4 Mac Mini, using the same routine. Just to be clear, I'm not compiling XNU myself, but am using the ones included in the kit.