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Is it possible to set the Derived Data location differently for different projects?
Within Xcode's settings location section is a drop down menu to switch between setting the derived data location to be default, relative or custom. However its a global setting. I work on more than one project simultaneously, and for one of them I want the location set to relative, but default for all the others. Is there any way of achieving that?
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Apr ’25
SwiftUI Preview Runtime linking failure
Swift Package: I have an old objc library, that is added as XCFramework to swift package as a binary target. targets: [ .target( name: "CoreServices", dependencies: ["OldContainer"], path: "CoreServices" ), .binaryTarget( name: "OldContainer", path: "Frameworks/OldContainer.xcframework" ), ] This serves the purpose, it builds fine and able to run on simulator. However this framework is breaking the Xcode previews. Error: == PREVIEW UPDATE ERROR: [Remote] JITError: Runtime linking failure Additional Link Time Errors: Symbols not found: [ _OBJC_CLASS_$_SCSecureServicesFactory ] ================================== | [Remote] LLVMError | | LLVMError: LLVMError(description: "Failed to materialize symbols: { (static-Login, { __replacement_tag$1015 }) }") == VERSION INFO: Tools: 16C5032a OS: 23G93 PID: 38675 Model: MacBook Pro Arch: arm64e == ENVIRONMENT: openFiles = [ /Users/../Documents/GitHub/Packages/Login/Sources/Login/LoginView.swift ] wantsNewBuildSystem = true newBuildSystemAvailable = true activeScheme = Launch activeRunDestination = iPhone 16 Pro Max variant iphonesimulator arm64 workspaceArena = [x] buildArena = [x] buildableEntries = [ Login Login ] runMode = JIT Executor == SELECTED RUN DESTINATION: Simulator - iOS 18.2 | iphonesimulator | arm64 | iPhone 16 Pro Max | no proxy == EXECUTION MODE OVERRIDES: Workspace JIT mode user setting: true Falling back to Dynamic Replacement: false Based on the error, SCSecureServicesFactory is an objc file inside the XCFramework. Since this is a binary target, I could not add a swift setting module map flag to the XCFramework. Is there any workaround to get the previews working ? Or Am I blocked until the library is converted into swift ?
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Mar ’25
Xcode 16.2 won't open project
Since updating to Sequoia, Xcode no longer opens some projects. What I’ve tried so far: Opening the project directly from the .xcworkspace file, but it still doesn’t open. The app doesn’t crash, but the project simply won’t load, and the UI doesn’t appear. What I tried: Uninstalled and reinstalled Xcode. Cloned the project from scratch. I’m currently using Sequoia 15.3.1 on a macbook pro M3.
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305
Feb ’25
Xcode 15/16: Copy (cmd+C) doesn’t work reliably when paused at a breakpoint
I’ve been running into an annoying issue for a while now and wondering if anyone else can confirm or suggest a fix. When Xcode hits a breakpoint (i.e., the app is paused), I often need to copy some text from the source code using cmd+C — for example, to paste into the debugger and inspect a variable or object. However, most of the time, the copy operation fails and nothing ends up on the clipboard. I have to repeat the copy action multiple times before it works. This doesn’t happen 100% of the time, but it’s frequent — maybe around 7 out of 10 attempts fail. I’ve been noticing this behavior since around Xcode 15. Has anyone else experienced this? Is there a known workaround or fix?
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Mar ’25
How to use xcframework in SwiftPackage and statically link it into iOS product
I want to statically link xcframework as binaryTarget in Swift Package, but it is copied into the product as dynamic when the Xcode build. How to use xcframework in SwiftPackage and statically link it into iOS product? The Package.swift content and the project are: The WebP.xcframework is static: The Xcode Build Product's WebP.framework is dynamic:
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Apr ’25
Xcode 16 „forgetting“ package in subfolder to root package
Xcode 16 seems to „forget“ a swift package within a subfolder of a root package after restart or shut-down. I have the following project structure, which also resembles the directory structure on disc: MyPackage - Package.swift - README.md - Sources - MyPackage - Tests - MyPackageTests - Tools - MyGenerator // <- after restart this folder is not visible in the Xcode project navigator - Package.swift - Sources - main.swift - Tests MyGenerator is a standalone package which is used during development of MyPackage to generate source code files for MyPackage based on text file input. Essentially an executable target script which I can run within its folder with: swift run MyGenerator someInputFile.txt MyPackage does NOT use MyGenerator as a dependency, nor do I want this tool listed as a dependency in MyPackage Package.swift file. Yet MyGenerator is part of the same Git repo, as it documents the changes to the tool on how to generate source code for MyPackage. Both packages are developed in tandem. MyGenerator itself defines dependencies in its Package.swift file, which are unrelated to the functionality of MyPackage. After restart of Xcode or even just a longer shut-down period the MyGenerator subfolder is not visible in the Xcode project navigator, the /Tools folder is empty. I have to manually add the sub package via Add files to "MyPackage" -> Move files to destination every time. How can I solve that Xcode remembers the sub package unter /Tools? Edit: I am using Xcode 16.2
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247
Mar ’25
OS 17 Disconnects from Xcode
Hello, Is anyone experiencing devices on OS 17 disconnecting from Xcode 15 and 16 Beta? I remember there were a lot of past conversations around the time when iOS 17 released but it seems to still be happening even after using Xcode 16 beta. Re-pairing devices and rebooting the hosts appear to fix it temporarily. I discovered that killing the remoted process also allows xcode to reconnect to the devices. Using Xcode 16's devicectl also doesn't work. I have my devices connected to a USB Hub and to multiple devices. The odd thing is I have iOS 16 devices connected and those don't disconnect. I believe iOS 17 introduced a new coredevice stack to connect but has anyone found a fix for it or have any recommendations? TN3158 isn't relevant in my situation because VPN and Packet filtering is not in use and I filed feedback with Apple but they have't responded in a long time.
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Feb ’25
Xcode 16 Automatically Builds & Runs Simulator While Editing Storyboard
I’m experiencing an issue in Xcode 16 where the app randomly builds and runs in the simulator while I’m designing items in the storyboard. Here’s what I’ve tried so far to stop this behavior: Disabled "Show Live Issues" in the General settings Removed all key bindings related to Build & Run in the Key Bindings settings Checked for unintentional shortcut triggers, but nothing seems to be causing it Update XCode from 16.1 to 16.2 Delete Derived Data Despite these actions, Xcode still automatically builds and launches the simulator at unexpected times, disrupting my workflow. Is there any setting or hidden configuration that could be causing this? How can I completely prevent Xcode from running the simulator automatically while editing UI in the storyboard? Would really appreciate any guidance on this!
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107
Mar ’25
Help! Golang os.Executable() panic on Xcode16 for iOS app
I have a iOS app using a gobind xcframework library. All went well when using Xcode 15.0 (15A240d), but failed on Xcode 16.2 (16C5032a). It’s confirmed the failure is from only Xcode version difference, all others like source code, lib binary, physical test iPhone all keeping the exact same. After digging, the root comes from golang os.Executable() call (https://pkg.go.dev/os#Executable), which is used in xcframework library. Using Xcode 15.0, os.Executable() returns “/var/containers/Bundle/Application/E80602C7-EFFB-4F1B-9FF8-FBA0E7E3DA76/Runner.app/Runner” as normal. But with Xcode 16.2, os.Executable() panic with err “cannot find executable path”. I’ve checked Xcode&SDK version change history, couldn’t find any clue like relevant permissions restrictions stuff. Could someone please share a hint? Thanks .
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Mar ’25
Uncategorized (Xcode): Command ClangStatCache failed with a nonzero exit code
I'm encountering an issue while trying to build my iOS app in Xcode for the simulator. Issue: Xcode Version: 15.x macOS Version: 14.x (Sonoma) Simulator: iPhone 16 Pro Error Message: Command ClangStatCache failed with a nonzero exit code Steps Taken: Cleaned build folder (Shift + Cmd + K) Deleted DerivedData (rm -rf ~/Library/Developer/Xcode/DerivedData) Updated Xcode and checked iOS SDK updates Disabled Clang Static Analyzer Cache None of these steps resolved the issue. Any help would be appreciated! Thanks in advance.
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238
Mar ’25
DriverKit XCode compilation errors
I'm working on dext project (c++), Base SDK and Supported Platforms are set to DriverKit. #include causes errors: error "The iostreams library is not supported since libc++ has been configured without support for localization." error "<locale.h> is not supported since libc++ has been configured without support for localization." Also it's not possible to define custom log object: undeclared identifier 'os_log_create'. <os/log.h> included and os_log function is compiled correct. macOS as additional SDK did not help. Thanks a lot for any hint.
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Apr ’25
Build Libraries For Distribution flag usage
I want to build an ios .xcframework (for external delivery) and .framework(for internal debugging) in order to package some code to a customer for incorporation into their app. My framework has a dependency upon RealmSwift, which I've added using SPM. There is a warning saying Module RealmSwift was not compiled with library evolution support. And when building SwiftVerifyEmittedModuleInterface fails with an error saying "missing required modules: 'Realm.Private', 'Realm', 'Realm.Swift'" By default, Build Libraries For Distribution was set to YES, however if I turn it off then the warning and error go away and I can cleanly build the framework. I've been attempting to get a good understanding of this flag and if it should be used or not, most material says yes but doesn't go a good job of explaining why. However anyway I can't get the framework to build with RealmSwift as a dependency without turning off this flag. Therefore is that ok to proceed down that route? Does the fact the xcframework will only ever be distributed to one consumer affect decisions (i.e. binary compatibility etc.) Thanks
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131
Mar ’25
Firebase Phone Auth OTP not working on TestFlight
Hi, I'm working in unity and I've implemented Firebase Phone Number Authentication in it. Everything works fine when I directly install build from xCode. App Attest screen shows up, user receives OTP on their phone and login works. But when I download the same build from TestFlight, it gets stuck after the user sends OTP request. I've added Push Notifications and App Attest in capabilities. I've also additionally added Remote Notifications. In device log I see an error about mobile provisioning file but I've added that to my account also. Is this expected behavior that phone number authentication does not work on TestFlight? If yes, how can I get this approved from apple since they need to test it before approving it. Thanks!
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235
Feb ’25
Xcode crash reports from TestFlight
My application is in flightTest mode. I received my first two crash reports in XCODE /Organizer. The context is well described, and I was able to isolate the locations where very serious errors occurred. My application is connected. I'm missing one piece of data in this crash report: the time of the crash. This will help me see what (in my case) static data was being read on the data server at that time. This will help me investigate. Is it possible to obtain this information?
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91
Mar ’25
Posting a Crash Report
If you need help investigating a crash, please include a crash report in your post. To smooth things along, follow these guidelines: For information on how to get a crash report, see Acquiring crash reports and diagnostic logs. Include the whole crash report as a text attachment (click the paperclip icon and then choose Add File). This avoids clogging up the timeline while also preserving the wealth of information in the crash report. If you’re not able to post your crash report as an attachment, see Can’t Post Crash Report as Attachment below. If you want to highlight a section of the report, include it in the main body of your post. Put the snippet in a code block so that it renders nicely. To create a code block, add a delimiter line containing triple backquotes before and after the block, or just click the Code Block button. If possible, post an Apple crash report. Third-party crash reporters are often missing critical information and have general reliability problems (for an explanation as to why, see Implementing Your Own Crash Reporter). Symbolicate your crash report before posting it. For information on how to do this, see Adding identifiable symbol names to a crash report. If you need to redact the crash report, do so consistently. Imagine you’re building the WaffleVarnish app whose bundle ID is com.example.wafflevarnish but you want to keep your new waffle varnishing technology secret. Replace WaffleVarnish with WwwwwwVvvvvvv and com.example.wafflevarnish with com.eeeeeee.wwwwwwvvvvvvv. This keeps the text in the crash report aligned while making it possible to distinguish the human-readible name of the app (WaffleVarnish) from the bundle ID (com.example.wafflevarnish). Finally, for information on how to use a crash report to debug your own problems, see Diagnosing issues using crash reports and device logs. Can’t Post Crash Report as Attachment Crash reports have two common extensions: .crash and .ips. If you have an .ips file, please post that [1]. DevForums lets you attach a .crash file but not an .ips file (r. 117468172). To work around this, change the extension to .txt. If DevForums complains that your crash report “contains sensitive language”, leave it out of your initial post and attach it to a reply. That often avoids this roadblock. If you still can’t post your crash report, upload it to a file sharing service and include the URL in your post. Post the URL in the clear, per tip 14 in Quinn’s Top Ten DevForums Tips. Getting a Crash Report from the Xcode Organiser The Xcode organiser shows crash reports from customers. If you’re investigating such a crash and want to post a crash report: Navigate to the crash in the Xcode organiser. Note If you can’t see the right crash, check the filter popups at the top. In the list of crashes, secondary click on your crash and choose Show in Finder. That reveals the Xcode crashpoint document (.xccrashpoint) in the Finder. Secondary click on that and choose Show Package Contents. In the resulting Finder window, find a crash report (.crash) that accurately represents the crash you’re investigating and attach that to your forums post. Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = "eskimo" + "1" + "@" + "apple.com" [1] Because it’s easy to go from an .ips file to a .crash file. I usually do this by choosing File > Quick Look in the Finder. For more info about these file formats, see this post. Revision History: 2025-08-29 Added the Getting a Crash Report from the Xcode Organiser section. 2024-11-21 Added a recommendation to post the .ips format if possible. 2024-05-21 Added some advice regarding the “contains sensitive language” message. 2023-10-25 Added the Can’t Post Crash Report as Attachment section. Made other minor editorial changes. 2021-08-26 First posted.
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Aug ’25