Hey Apple Team! We recently updated to Xcode 16 and saw a massive memory spike, which caused "Out of memory" Mac warnings in the final stages of our app's build process. We noticed that the process responsible for this is "EmbeddedBinaryValidationUtility" (see screenshot). Is there a workaround to limit its memory usage? This is causing significant anguish for our developers.

Hi, I am able to build my iOS app successfully, developed in objective-C with iOS 17.5 SDK and Xcode 15. Due to requirement of Appstore we are trying to build with iOS 18 SDK and Xcode 16. When building getting error in LAEnvironmentState.h file: a) "Property requires field to be named" b) "Expected member name or ';' after declaration specifiers" Same app when opening with Xcode 15 gets build without any issue. Any help/suggestion would be appreciated.

Hi there, When using devicectl to manage files: It's unclear for which domains the username should be provided It's unclear how to determine the username Listing files USAGE: devicectl device info files [<options>] --device <uuid|ecid|serial_number|udid|name|dns_name> --domain-type <domain-type> FILE OPTIONS: --username <username> The username of the user we should target. Only relevant for certain domains. --domain-type <domain-type> The file service domain. Valid values are: temporary, appDataContainer, appGroupDataContainer, systemCrashLogs. You must specify a valid domain and identifier pair. Certain domains must be accompanied by an identifier that provides additional context. For example, if the domain is an app data container, the identifier is the bundle ID of the app. For temporary directories, the identifier is a unique client-provided string which is used to get your own space, separate from those of other clients. --domain-identifier <domain-identifier> A unique string used to provide additional context to the domain. --username The username of the user we should target. Only relevant for certain domains. In the domains, the username requirements are not mentioned. Copying files USAGE: devicectl device copy to --device <uuid|ecid|serial_number|udid|name|dns_name> --source <source> [--destination <destination>] [--user <user>] --domain-type <domain-type> [--domain-identifier <domain-identifier>] [--remove-existing-content <remove-existing-content>] [--verbose] [--quiet] [--timeout <seconds>] [--json-output <path>] [--log-output <path>] DEVICE OPTIONS: -d, --device <uuid|ecid|serial_number|udid|name|dns_name> The identifier, ECID, serial number, UDID, user-provided name, or DNS name of the device. FILE OPTIONS: --source <source> The item which should be copied. --destination <destination> The location to which the item should be copied. -u, --user <user> The name of the user we should target. Only relevant for certain domains. --domain-type <domain-type> The file service domain. Valid values are: temporary, appDataContainer, appGroupDataContainer, systemCrashLogs. You must specify a valid domain and identifier pair. Certain domains must be accompanied by an identifier that provides additional context. For example, if the domain is an app data container, the identifier is the bundle ID of the app. For temporary directories, the identifier is a unique client-provided string which is used to get your own space, separate from those of other clients. --domain-identifier <domain-identifier> A unique string used to provide additional context to the -u, --user The name of the user we should target. Only relevant for certain domains. The "certain domains" are not specified. user vs username The list files command takes: --username <username> The username of the user we should target. Only relevant for certain domains The copy command takes: -u, --user <user> The name of the user we should target. Only relevant for certain domains. Is there a difference between username and user? How do we figure out the user or username? From https://developer.apple.com/forums/thread/749649 I learned that about the "mobile" value, but why, and how? It would help if these arguments could be explained in more detail.

We have a script that builds several Swift Packages using xcodebuild. Since Xcode 16.3, xcodebuild crashes when invoked on a Swift Package, with the following error xcodebuild -list Command line invocation: /Applications/Xcode.app/Contents/Developer/usr/bin/xcodebuild -list Resolve Package Graph ** INTERNAL ERROR: Unable to load workspace '/Users/glaurent/Developer/livesight-universalsdk/SDKs/Modules/CommonObjC' ** Uncaught Exception: -[Swift.__SwiftDeferredNSArray intersectsSet:]: unrecognized selector sent to instance 0x600002593e00 Stack: 0 __exceptionPreprocess (in CoreFoundation) 1 objc_exception_throw (in libobjc.A.dylib) 2 -[NSObject(NSObject) __retain_OA] (in CoreFoundation) 3 ___forwarding___ (in CoreFoundation) 4 _CF_forwarding_prep_0 (in CoreFoundation) 5 -[DVTCoreDevice(DVTCoreDeviceIDE) deviceSupportsBuildable:buildParameters:error:] (in IDEFoundation) 6 -[DVTCoreDevice(DVTCoreDeviceIDE) supportedArchitecturesForBuildableContext:buildParameters:error:] (in IDEFoundation) 7 _IDERunDestinationsForBuildableUsingDeviceWithBuildParameters (in IDEFoundation) 8 -[IDERunDestinationManager runDestinationsForScheme:schemeCommands:executionEnvironment:eligibleOnly:genericOnly:architectureVisibility:] (in IDEFoundation) 9 IDESchemeDetermineAvailableRunDestinations (in IDEFoundation) 10 -[IDEScheme _actuallyInvalidateAvailableRunDestinations] (in IDEFoundation) 11 addSchemeAndMakeActiveIfNecessary #1 (result:error:) in IDESwiftPackage.generateScheme(with:buildable:additionalBuildables:unsetRunnable:makeActive:orderHint:) (in IDESwiftPackageCore) 12 IDESwiftPackage.generateScheme(with:buildable:additionalBuildables:unsetRunnable:makeActive:orderHint:) (in IDESwiftPackageCore) 13 IDESwiftPackage.generateSchemes(_:isRootPackage:) (in IDESwiftPackageCore) 14 IDESwiftPackage.update(from:graphHasErrors:delegate:) (in IDESwiftPackageCore) 15 specialized IDESPMWorkspaceDelegate.rootPackagesDidUpdate(packages:graphHasErrors:modelGraphSynchronizerToken:) (in IDESwiftPackageCore) 16 closure #1 in IDESPMWorkspaceDelegate.packageGraphDidFinishAction(_:duration:result:) (in IDESwiftPackageCore) 17 partial apply for closure #1 in IDESPMWorkspaceDelegate.disableWorkspaceContentSynchronization(during:) (in IDESwiftPackageCore) 18 <deduplicated_symbol> (in DVTFoundation) 19 <deduplicated_symbol> (in DVTFoundation) 20 thunk for @escaping @callee_guaranteed () -> () (in DVTFoundation) 21 __58-[DVTModelObjectGraph performBlockCoalescingModelChanges:]_block_invoke (in DVTFoundation) 22 -[DVTModelGraphTransactionScope performTransaction:] (in DVTFoundation) 23 -[DVTModelObjectGraph performBlockCoalescingModelChanges:] (in DVTFoundation) 24 DVTModelObjectGraph.performBlockCoalescingModelChanges<A>(_:) (in DVTFoundation) 25 IDESPMWorkspaceDelegate.disableWorkspaceContentSynchronization(during:) (in IDESwiftPackageCore) 26 IDESPMWorkspaceDelegate.packageGraphDidFinishAction(_:duration:result:) (in IDESwiftPackageCore) 27 <deduplicated_symbol> (in IDESwiftPackageCore) 28 SPMWorkspace.packageGraphActionFinished(_:) (in SwiftPM) 29 closure #2 in closure #3 in SPMWorkspace.processPackageGraphActionsInBackgroundIfNeeded(canProcessPackageGraphActions:) (in SwiftPM) 30 partial apply for closure #1 in SPMSDKPackageContainer.loadManifest() (in SwiftPM) 31 specialized thunk for @escaping @isolated(any) @callee_guaranteed @async () -> (@out A) (in SwiftPM) 32 partial apply for closure #1 in SPMSDKPackageContainer.loadManifest() (in SwiftPM) 33 completeTaskWithClosure(swift::AsyncContext*, swift::SwiftError*) (in libswift_Concurrency.dylib) This error happens regardless of the command passed to xcodebuild.

I don't know Xcode very well, and had been using it sporadically to test a project exported from Unity. I recently added a StoreKit Configuration to the project, and since then it gives me ≈10s after launching before the beach ball appears, and it never leaves. Xcode says it is "Indexing" but I don't know if that's an obvious culprit. I can still build my project via the fastlane tool, on the command line, and the newly-added StoreKit configuration works just fine. But I cannot use Xcode interactively any more, unless I re-export the project from Unity. The only difference between it working and hanging is the Store Kit configuration. How do I understand what's going on, and (ideally) fix it? The Activity Monitor gives a bunch of backtraces that don't have an obvious network or I/O culprit in them.

Hello everyone! When I run UI Tests on Xcode Cloud, I often encounter unexpected failures. Checking the screen recording, I found that the iOS Simulator could go into a black screen with a white Apple logo and a progress bar for a period after the test starts. This behavior of the Simulator causes my app's UI Tests to fail randomly, which greatly affects the practical use of UI Tests. I suspect this phenomenon is unrelated to my app and test cases, so I'm asking if anyone else has encountered a similar issue. 🤔

After upgrading to Xcode 16.3, whenever I open the Documentation window, Xcode started CPU hungry mode, forever. Does anyone else have the same experience as me? Is there any known remedy so far?

I've updated to Sequoia 15.4 and Xcode 16.3 on my Intel iMac 2019 and now everything Xcode does results in a spinning rainbow. Open a window? Spin. Look up documentation? Spin. Compile the app? Well that doesn't spin, but simple things like compiling a storyboard now takes over 5 minutes. Every compile needs to redo compiling Clang modules over and over again. And compiling the project at times just stalls out. It's been bad for a while but now with these versions it's gotten even worse. Is Apple just saying give up on Intel and get an M-series Mac just to develop with? On my Intel Mac the project takes over 19 minutes to compile. The main storyboard takes almost 7 minutes alone! It didn't take this long with Xcode 16.2. The other storyboards are showing times of over 4 minutes as well, a vast increase. A swift file with two functions, neither of which is over 10 lines, takes 87 seconds? It seems like everything involving swift code is now taking much much longer to compile. And don't even get me started on debugging. 90% of the time I can't find symbols, and clicking on a variable leads to spinning. Entering anything into the debugger window results in a warning about not being able to show the value and now I have to figure out how to cast the return value to what it should be? Why? All of this used to work, and now it doesn't. Or does, but not reliably. So after all this, I went and configured an M3 Mac mini I had dedicated for other purposes for Xcode. Took a while as the mini is very limited on space, and Xcode was too big. After getting it set up, certificates transferred, account set up etc, I copied the app's files and hit build. It took 47 seconds.

Hi, I'm testing out Xcode 16 beta and I have a couple of questions: Is Swift Assist only available on Sequoia? I see that predictive code completion is per https://www.apple.com/newsroom/2024/06/apple-empowers-developers-and-fuels-innovation-with-new-tools-and-resources/, but I tried the beta on Sonoma and I'm not seeing it Regarding Swift Assist - I understand that code is only used to process requests and never stored on servers, and Apple will not use it to train machine learning models. However, my company's security team may still decide that using Swift Assist is too much of a risk. How can we disable it across multiple developer machines? Thank you!

Hi, I just migrated from Xcode 15 to Xcode 16.3 RC. When I run my app on any simulator, iOS 17 or iOS 18, I seeing strange behavior the second time I launch the app. The app uses a few frameworks, such as Firebase Crashlytics, and the network calls all work fine on the initial launch. however, subsequent launches consistently get the following error: Task <17ACD3D4-FB31-4091-A797-D573F31909C2>.<2> finished with error [-1001] Error Domain=NSURLErrorDomain Code=-1001 "The request timed out." UserInfo={_kCFStreamErrorCodeKey=-2102, NSUnderlyingError=0x600000c46910 {Error Domain=kCFErrorDomainCFNetwork Code=-1001 "(null)" UserInfo={_kCFStreamErrorCodeKey=-2102, _kCFStreamErrorDomainKey=4}}, _NSURLErrorFailingURLSessionTaskErrorKey=LocalDataTask <17ACD3D4-FB31-4091-A797-D573F31909C2>.<2>, _NSURLErrorRelatedURLSessionTaskErrorKey=( "LocalDataTask <17ACD3D4-FB31-4091-A797-D573F31909C2>.<2>" ), NSLocalizedDescription=The request timed out., The only way to run again on that simulator is to Erase All Content and Settings. I did not see this issue in Xcode 16, and my app has been in production for over a year without networking issues. Pushing to my phone works fine. Running on MacBook Pro apple silicon - Sequoia 15.3.2 Any help would be greatly appreciated! Thanks, Mike

When I open the "devices and simulators" window now I only see "No selection" in the center. No sidebar pane, and no detail pane. I was able to set up some simulators up to last week or so, and now this. I've no idea how to create a new simulator or inspect the ones I have.

The WatchOS developer is not allowed to obtain healthKit permission status. The result is always unauthorized (either by clicking the dot/cross in the upper left corner or by turning on all Health, on some, off all). WatchOS 开发获取 healthKit 的权限状态authorizationStatus不准。结果始终都是未授权（无论是点击左上角的点叉号还是开启全部健康项开关，开启部分，关闭所有），怎么处理？

I have a swift project with a Watch companion. Since the update of Xcode in 16.3 version after updating MAcOs , Watch OS, iOS to the latest version . It is quasi impossible for me to make Xcode work with my series 10 Watch. I have a lot of alert box, messages in the "device & Simulator" tool like this Previous preparation error: A connection to this device could not be established.; Timed out while attempting to establish tunnel using negotiated network parameters. And many message telling me that Xcode is preparing the Watch , then that it has lost the connexion. I have to wait some minutes after EACH run of the App to test it again. This is very annoying . Some of the alerts I have : And the best to know , is that I can run the APP outside of Xcode , it works, Connects to the iPhone, fetch data and so. the iPhone sees the Watch without and problem. Reboots can solve for a few minutes the problem. But that is not a solution.

I tried installing the emulator directly from xcode，invalid signature talking about my Mac or the simulator package？ Error detial： (-67061 invalid signature (code or signature have been modified) Domain: SimDiskImageErrorDomain Code: 5 User Info: { DVTErrorCreationDateKey = "2025-04-07 08:21:21 +0000"; unusableErrorDetail = ""; } (-67061 invalid signature (code or signature have been modified) Domain: SimDiskImageErrorDomain Code: 5 User Info: { unusableErrorDetail = ""; } System Information macOS Version 14.6.1 (Build 23G93) Xcode 16.2 (23507) (Build 16C5032a) Timestamp: 2025-04-07T16:21:21+08:00

Hello, For one of my recent release (2 versions ago), I used to be able to check its p50 of Hang Rate, but now it disappear and not showing up in XCode Organizer Metrics anymore. The p90 of Hang Rate of this version is still there. It's so unpredictable. Is there something we can do to get this data to populate? If not, may I understand usually why this issue will happen, is it something frond-end bug or is it because there is some thing abnormal going on in the back-end data?

Hi, I'm using XCode 16 to connect my iPhone. Recently I'm getting an error as below while connecting to Xcode to install the app Timeout while connecting to remote device. Domain: com.apple.mobiledevice Code: -402652910 User Info: { DVTErrorCreationDateKey = "2025-04-02 15:03:29 +0000"; FunctionName = "_AMDeviceCreateWithRemoteDeviceWithError"; IDERunOperationFailingWorker = IDEInstallCoreDeviceWorker; LineNumber = 334; } System Information macOS Version 15.3.2 (Build 24D81) Xcode 16.2 (23507) (Build 16C5032a) Is there any way we can connect iOS 18 devices through USB only?

macOS 15.4 I've just updated Xcode to version 16.3 via the the App Store. The project was previously working fine. After installing all components and Apple Intelligence, I loaded my SwiftUI-based iOS app project. Xcode Preview fails to load, with an error: "Failed to create simulator" == PREVIEW UPDATE ERROR: FailedToCreateDeviceError<SimRuntime>: Failed to create simulator Xcode Previews needs to create simulator devices for running previews Device Type: com.apple.CoreSimulator.SimDeviceType.iPhone-16-Pro Runtime: com.apple.CoreSimulator.SimRuntime.iOS-18-2 ================================== | NSError.com.apple.CoreSimulator.SimError.401: The iOS 18.2 simulator runtime is not available. | | Try reinstalling Xcode or the simulator runtime. | | com.apple.CoreSimulator.SimError (401): | ==NSLocalizedFailureReason: liblaunch_sim.dylib could not be opened I cleaned the build folder, tried again. Same result. When I try to Build the project, I get an immediate error: Failed to find a suitable device for the type IBSimDeviceTypeiPad3x (com.apple.dt.Xcode.IBSimDeviceType.iPad-3x) with runtime iOS 18.4 (18.4 - 22E238) - com.apple.CoreSimulator.SimRuntime.iOS-18-4 (The project does not target iPad. The supported Destinations are iPhone, Mac (Designed for iPhone) and Apple Vision (Designed for iPhone). The minimum deployment target is iOS 18.0 Any help is appreciated, thank you. [SOLVED - restarted Mac again. Errors disappeared. Leaving this here for anyone else who has this issue.]

with the latest Xcode version, i am getting all kinds of errors: few main ones: /Users/akashbhatia/MyApp/ios/Pods/Target Support Files/ReactCodegen/ReactCodegen-prefix.pch:2:9 Could not build module 'UIKit' /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator18.4.sdk/System/Library/Frameworks/CFNetwork.framework/Headers/CFNetwork.h:18:10 Could not build module 'CoreFoundation' /Users/akashbhatia/MyApp/ios/Pods/Headers/Public/RCT-Folly/folly/portability/Config.h:20:10 'folly/folly-config.h' file not found I have reinstalled Xcode, removed derived data, installed pod over and over again, but I have realized from the first error here, that it has more to do with Xcode and React Native now. Any help will be appreciated.

I'm trying to load a Safari Extension onto my physical iPhone 15 running iOS 18.4 but am seeing the following message: "iOS 18.4 is not installed." When I click the Get button I see that the download has failed with the following error message. I tried updating my laptop to Sequoia and I also deleted and re-installed Xcode but that didn't fix it. Any thoughts? Download failed. Domain: DVTDownloadableErrorDomain Code: 41 User Info: { DVTErrorCreationDateKey = "2025-04-08 06:00:22 +0000"; } -- Download failed. Domain: DVTDownloadableErrorDomain Code: 41 -- Failed fetching catalog for assetType (com.apple.MobileAsset.iOSSimulatorRuntime), serverParameters ({ RequestedBuild = 22E238; }) Domain: DVTDownloadsUtilitiesErrorDomain Code: -1 -- Download failed due to a bad URL. (Catalog download for com.apple.MobileAsset.iOSSimulatorRuntime) Domain: com.apple.MobileAssetError.Download Code: 49 User Info: { checkConfiguration = 1; } -- System Information macOS Version 15.4 (Build 24E248) Xcode 16.3 (23785) (Build 16E140) Timestamp: 2025-04-07T23:00:22-07:00

Consider this stripped-down example of a view with a view model: import Observation import SwiftUI struct MainView: View { @State private var viewModel = ViewModel() private let items = [0, 1, 2] var body: some View { List { GroupedItemsView( viewModel : viewModel.groupState, groupedItems : [(0, items)] ) } } } fileprivate struct GroupedItemsView<ViewModel: GroupsExpandable>: View { let viewModel : ViewModel let groupedItems : [(ViewModel.GroupTag, [Int])] var body: some View { ForEach(groupedItems, id: \.0) { groupTag, items in Text("nothing") } } } fileprivate protocol GroupsExpandable: AnyObject { // HERE associatedtype GroupTag: Hashable } fileprivate final class GroupState<GroupTag: Hashable>: GroupsExpandable {} @Observable fileprivate final class ViewModel { var groupState = GroupState<Int>() } #Preview { MainView() } This compiles and runs fine in the Simulator, but it crashes in the Preview. However, when I remove the fileprivate modifier before GroupsExpandable (see HERE), it also runs in the Preview. What is the reason for this? Bug in Preview? Error on my side somewhere? Thanks. System is Xcode Version 16.3 (16E140) on a MacBook Pro 2018 (Intel) running Sequoia 15.3.2 Devices are iPhone 16 Pro Max with iOS 18.3.1, compiler is set to Swift 6.