Some Macs recently received a macOS system update which disabled the simulator runtimes used by Xcode 15, including the simulators for iOS, tvOS, watchOS, and visionOS. If your Mac received this update, you will receive the following error message and will be unable to use the simulator: The com.apple.CoreSimulator.SimRuntime.iOS-17-2 simulator runtime is not available. Domain: com.apple.CoreSimulator.SimError Code: 401 Failure Reason: runtime profile not found using "System" match policy Recovery Suggestion: Download the com.apple.CoreSimulator.SimRuntime.iOS-17-2 simulator runtime from the Xcode To resume using the simulator, please reboot your Mac. After rebooting, check Xcode Preferences → Platforms to ensure that the simulator runtime you would like to use is still installed. If it is missing, use the Get button to download it again. The Xcode 15.3 Release Notes are also updated with this information.

I've been aware for some time that Push notifications work on the iOS simulator now -- I see them pop up while I'm working. However, it would seem that SILENT push notifications do not work. I came to this conclusion only after several frustrating hours of debugging my app, thinking either the app was broken or the server wasn't sending the notification. Finally I tested it on a device and found that it actually works fine. Why does such a limitation exist? If I can't depend on the simulator to handle ALL of the notifications, I'd rather it didn't work at all. Having it work part of the time on some notifications is really confusing.

running my Xcode app in Simulator: screenshots are sent to Library/Developer/CoreSimulator/Devices followed by the cryptic code for the device ( given in /Library/Developer/CoreSimulator/Devices/device_set.plist ), a subdirectory then the PNG file. This is very inconvenient. How to I set the desired directory?

I have experienced problems with my app crashing on build (I believe it's while linking) with various combinations of Xcode version and iOS simulator version. It dates back to Xcode 16.3 in my testing, and continues through Xcode 16.4 and all Xcode 26 betas. This occurs whether the project running is UIKit-based or SwiftUI-based. Simply dropping a file with the following code into a project, without even needing to refer to its class anywhere else in the project, produces the crash. import Foundation import WebKit class WebBrowserController: NSObject, ObservableObject, WKNavigationDelegate { var webView: WKWebView override init() { self.webView = WKWebView() super.init() } func findString(_ string: String, completion: @escaping (WKFindResult) -> Void) { let configuration = WKFindConfiguration() webView.find(string, configuration: configuration) { result in completion(result) } } } With Xcode 26 beta 4 I am experiencing this issue with iOS 18.4 and iOS 18.5 simulators, but not with iOSW 18.3 or iOS 26 simulators. The complete history of my testing back to Xcode 16.3 and the problematic iOS versions is included Feedback #FB17737471. The crash message appearing in the Xcode 26 beta 4 console for iOS 18.5 is below: dyld[7438]: Library not loaded: /usr/lib/swift/libswiftWebKit.dylib Referenced from: <EF9CE2A7-9F7C-316D-869F-087AECC76C53> /Users/dennisbirch/Library/Developer/CoreSimulator/Devices/CD82152C-E407-4350-B8AE-C15B5304CA05/data/Containers/Bundle/Application/94F80728-CECE-4C24-84CF-C435069B276A/SwiftUIMissingWebViewLib.app/SwiftUIMissingWebViewLib.debug.dylib Reason: tried: '/Users/dennisbirch/Library/Developer/Xcode/DerivedData/SwiftUIMissingWebViewLib-dbhkxwiichsdtygsnxqszkylbivv/Build/Products/Debug-iphonesimulator/libswiftWebKit.dylib' (no such file), '/Library/Developer/CoreSimulator/Volumes/iOS_22F77/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.5.simruntime/Contents/Resources/RuntimeRoot/usr/lib/system/introspection/libswiftWebKit.dylib' (no such file), '/Library/Developer/CoreSimulator/Volumes/iOS_22F77/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.5.simruntime/Contents/Resources/RuntimeRoot/usr/lib/swift/libswiftWebKit.dylib' (no such file), '/usr/lib/swift/libswiftWebKit.dylib' (no such file, not in dyld cache), '/Library/Developer/CoreSimulator/Volumes/iOS_22F77/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.5.simruntime/Contents/Resources/RuntimeRoot/usr/lib/libswiftWebKit.dylib' (no such file) Library not loaded: /usr/lib/swift/libswiftWebKit.dylib Referenced from: <EF9CE2A7-9F7C-316D-869F-087AECC76C53> /Users/dennisbirch/Library/Developer/CoreSimulator/Devices/CD82152C-E407-4350-B8AE-C15B5304CA05/data/Containers/Bundle/Application/94F80728-CECE-4C24-84CF-C435069B276A/SwiftUIMissingWebViewLib.app/SwiftUIMissingWebViewLib.debug.dylib Reason: tried: '/Users/dennisbirch/Library/Developer/Xcode/DerivedData/SwiftUIMissingWebViewLib-dbhkxwiichsdtygsnxqszkylbivv/Build/Products/Debug-iphonesimulator/libswiftWebKit.dylib' (no such file), '/Library/Developer/CoreSimulator/Volumes/iOS_22F77/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.5.simruntime/Contents/Resources/RuntimeRoot/usr/lib/system/introspection/libswiftWebKit.dylib' (no such file), '/Library/Developer/CoreSimulator/Volumes/iOS_22F77/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.5.simruntime/Contents/Resources/RuntimeRoot/usr/lib/swift/libswiftWebKit.dylib' (no such file), '/usr/lib/swift/libswiftWebKit.dylib' (no such f dyld config: DYLD_SHARED_CACHE_DIR=/Library/Developer/CoreSimulator/Caches/dyld/25A5316i/com.apple.CoreSimulator.SimRuntime.iOS-18-5.22F77/ DYLD_ROOT_PATH=/Library/Developer/CoreSimulator/Volumes/iOS_22F77/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.5.simruntime/Contents/Resources/RuntimeRoot DYLD_LIBRARY_PATH=/Users/dennisbirch/Library/Developer/Xcode/DerivedData/SwiftUIMissingWebViewLib-dbhkxwiichsdtygsnxqszkylbivv/Build/Products/Debug-iphonesimulator:/Library/Developer/CoreSimulator/Volumes/iOS_22F77/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.5.simruntime/Contents/Resources/RuntimeRoot/usr/lib/system/introspection DYLD_INSERT_LIBRARIES=/Library/Developer/CoreSimulator/Volumes/iOS_22F77/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.5.simruntime/Contents/Resources/RuntimeRoot/usr/lib/libLogRedirect.dylib:/Library/Developer/CoreSimulator/Volumes/iOS_22F77/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.5.simruntime/Contents/Resources/RuntimeRoot/usr/lib/libBacktraceRecording.dylib:/Library/Developer/CoreSimulator/Volumes/iOS_22F77/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.5.simruntime/Contents/Resources/RuntimeRoot/usr/lib/libMainThreadChecker.dylib:/usr/lib/libRPAC.dylib:/Library/Developer/CoreSimulator/Volumes/iOS_22F77/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.5.simruntime/Contents/Resources/RuntimeRoot/usr/lib/libViewDebuggerSupport.dylib DYLD_FRAMEWORK_PATH=/Users/dennisbirch/Library/Developer/Xcode/DerivedData/SwiftUIMissingWebViewLib-dbhkxwiichsdtygsnxqszkylbivv/Build/Products/Debug-iphonesimulator DYLD_FALLBACK_FRAMEWORK_PATH=/Library/Developer/CoreSimulator/Volumes/iOS_22F77/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.5.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks DYLD_FALLBACK_LIBRARY_PATH=/Library/Developer/CoreSimulator/Volumes/iOS_22F77/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.5.simruntime/Contents/Resources/RuntimeRoot/usr/lib

Using Xcode 26 Beta 3 on MacOS 26 Beta 3, I cannot see any Rosetta Simulators even though I've turned on: Xcode Product -> Destination -> Show All Run Destinations I suspected that there has been an issue with showing them on Xcode, then I used Terminal to verify: First I tried to run/build unit tests with an ARM64 simulator, of course, I got a failed result - Because my project hasn't fully supported ARM64 yet. xcodebuild test \ -scheme MyScheme \ -project MyProject.xcodeproj \ -destination "platform=iOS Simulator,name=iPhone 16,arch=arm64" Output: Undefined symbol: _OBJC_CLASS_$_MTAmiVoice Then I tried with a Rosetta simulator: xcodebuild test \ -scheme MyScheme \ -project MyProject.xcodeproj \ -destination "platform=iOS Simulator,name=iPhone 16,arch=x86_64" Output: xcodebuild: error: Unable to find a destination matching the provided destination specifier: { platform:iOS Simulator, arch:x86_64, OS:latest, name:iPhone 16 } Available destinations for the "MyScheme" scheme: { platform:macOS, arch:arm64, variant:Designed for [iPad,iPhone], id:14975ac530130e6513017194c34d61ec91d18706, name:My Mac } { platform:iOS, id:dvtdevice-DVTiPhonePlaceholder-iphoneos:placeholder, name:Any iOS Device } { platform:iOS Simulator, id:dvtdevice-DVTiOSDeviceSimulatorPlaceholder-iphonesimulator:placeholder, name:Any iOS Simulator Device } { platform:iOS Simulator, arch:arm64, id:ADD3BC9A-B3C5-4A60-9BC0-AE5C0CC5AB74, OS:26.0, name:iPad (A16) } { platform:iOS Simulator, arch:arm64, id:2CA6EE27-BDC0-4A01-9ADF-418F3C967EED, OS:26.0, name:iPad Air 11-inch (M3) } { platform:iOS Simulator, arch:arm64, id:73F383A0-FBA9-4EE8-95F1-C337B936A5F2, OS:26.0, name:iPad Air 13-inch (M3) } { platform:iOS Simulator, arch:arm64, id:3A0EE8B8-6F69-455D-B69A-8F2A834608D3, OS:26.0, name:iPad Pro 11-inch (M4) } { platform:iOS Simulator, arch:arm64, id:61358EB9-A87E-45F9-80EB-CA17D2289C54, OS:26.0, name:iPad Pro 13-inch (M4) } { platform:iOS Simulator, arch:arm64, id:D040351C-6177-42BC-B0E2-9E0C995EA515, OS:26.0, name:iPad mini (A17 Pro) } { platform:iOS Simulator, arch:arm64, id:7D58AA15-86D0-4E8A-8C1C-A6CD33B70BB4, OS:26.0, name:iPhone 16 } { platform:iOS Simulator, arch:arm64, id:4CE14A8D-3E2C-4ACA-B12C-41F4642553D2, OS:26.0, name:iPhone 16 Plus } { platform:iOS Simulator, arch:arm64, id:C5B76D64-DC54-4BB9-8EFC-CF44D8346379, OS:26.0, name:iPhone 16 Pro } { platform:iOS Simulator, arch:arm64, id:5973F4D1-5C4F-4386-B0BA-A36C1A542138, OS:26.0, name:iPhone 16 Pro Max } { platform:iOS Simulator, arch:arm64, id:A6030BF7-0D50-4A48-A883-FDC276C6FCFF, OS:26.0, name:iPhone 16e } As far as I can understand, there is no Rosetta Simulator installed yet. My question is: Are there any additional steps that I need to do to trigger Rosetta Simulators on this workstation? With my other workstation, I have Mac Sequoia 15.5, Xcode 16 and Xcode 26 Beta 3, everything works perfectly for me: I can see Rosetta Simulator with Xcode 26 Beta and run my app with on Rosetta simulators. See more: https://developer.apple.com/forums/thread/791500?answerId=848514022#848514022

I installed the third beta of Xcode 26 with Xcode 16.4 installed on my machine. Once Xcode 26 was installed, all of my previous simulators were wiped out, leaving only the default iOS 26 simulators. I cannot create new simulators for iOS versions below 26. Here are my failed attempts to fix the issue: Restarted Xcode 16.4 and my machine Reinstalled the iOS 18.5 runtime Uninstalled Xcode 26 and iOS 26 runtime Reinstalled Xcode 16.4 Now, I literally cannot use a simulator in Xcode 16.4. Here is what I see when I try to create a new simulator in Xcode 16.4: According to Xcode, the iOS 18.5 runtime is installed, so I have no idea what is going on. Is this a known issue? And how do I get Xcode 16.4 working with the iOS simulator?

I downloaded the Xcode Beta 3 on my MacBook Pro M4 Base today and tested out some iOS26 mechanics of my app. And when I came back to my main Xcode to continue developing in iOS18, I couldn't build my app. I went to Product &gt; Destination &gt; Manage run destinations and then tried to create a simulator with iOS18 but it didn't show up, only choice that's showing up was iOS26. I tried deleting iOS18 platform and downloading it again but it didn't solve, I tried deleting Xcode Beta but it didn't solve the problem either. I deleted Runtimes folder, it didn't solve too. I can not create a simulator of iOS18 or below too, the error says "The iOS 18.5 simulator runtime is not available. Try reinstalling Xcode or the simulator runtime." How can I fix this problem?

Cannot download 18.5 simulator Download failed. Domain: DVTDownloadableErrorDomain Code: 41 User Info: { DVTErrorCreationDateKey = "2025-07-12 08:12:00 +0000"; } Download failed. Domain: DVTDownloadableErrorDomain Code: 41 Failed fetching catalog for assetType (com.apple.MobileAsset.iOSSimulatorRuntime), serverParameters ({ RequestedBuild = 22F77; }) 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 15.5 (Build 24F74) Xcode 16.4 (23792) (Build 16F6) Timestamp: 2025-07-12T18:12:00+10:00

Download failed. Domain: DVTDownloadableErrorDomain Code: 41 User Info: { DVTErrorCreationDateKey = "2025-07-11 16:39:49 +0000"; } Download failed. Domain: DVTDownloadableErrorDomain Code: 41 Failed fetching catalog for assetType (com.apple.MobileAsset.iOSSimulatorRuntime), serverParameters ({ RequestedBuild = 22F77; }) Domain: DVTDownloadsUtilitiesErrorDomain Code: -1 Download failed due to not being able to connect to the host. (Catalog download for com.apple.MobileAsset.iOSSimulatorRuntime) Domain: com.apple.MobileAssetError.Download Code: 60 User Info: { checkNetwork = 1; } System Information macOS Version 15.5 (Build 24F74) Xcode 16.4 (23792) (Build 16F6) Timestamp: 2025-07-11T22:09:49+05:30

It's been an ask for a few years and I'm wondering if there are any plans, or whether the '26 SDKs/Tools allow Apple Music to work in the simulator? I develop for the Vision Pro so the usual 'fix' of running on the device is a bit of a hard ask. At the very least a small sample library that works in the simulator would be welcome (similar to how photos works) Cheers

Hi everyone, We’re testing the new iOS 26 capability, Performing Fast Account Creation with Passkeys, using the sample project provided here: Performing Fast Account Creation with Passkeys. When running the project on the iOS 26 simulator and tapping the "Sign Up" button, we encounter the following error: The operation couldn’t be completed. (com.apple.AuthenticationServices.AuthorizationError error 1010.) From the header file, this error is described as: /// ASAuthorizationError.h /// This error signals that the device is not currently set up to create passkeys. ASAuthorizationErrorDeviceNotConfiguredForPasskeyCreation AS_API_AVAILABLE(ios(19.0), macos(16.0), visionos(3.0)) = 1010, We’ve tested this on both Xcode 26 Beta 1 and Beta 2, and the error persists on the simulator in both versions. However, when testing on a physical iOS 26 device, everything works as expected, just like in the WWDC demo. Could this issue be related to missing simulator settings? Or is it a potential bug in the simulator? Any advice would be greatly appreciated. Thanks in advance!

When looking ay space used by system, I found that AssetsV2 (in System/Library) account for 270 GB. In this folder, 3 account for 260 GB and are apparently related to Xcode simulators: Content is a bit cryptic. Does it relate to some specific apps I compiled and ran on simulator ? Or is it related to older versions of Xcode I keep on the Mac ? How to know what each forlder relates to ? Is it safe to remove ?

I sometimes use Xcode 14.2. Recently, I have an issue with simulators: on some SwiftUI project, the simulator list is empty. I created a new project. I see the complete list of simulators, but when running for a simulator, it fails with following diag; Same error with UIKit project. Details Unable to boot the Simulator. Domain: NSPOSIXErrorDomain Code: 60 Failure Reason: launchd failed to respond. User Info: { DVTErrorCreationDateKey = "2025-06-29 06:16:35 +0000"; IDERunOperationFailingWorker = "_IDEInstalliPhoneSimulatorWorker"; Session = "com.apple.CoreSimulator.SimDevice.134EC197-BA6B-45DF-B5B2-61A1D4F14863"; } -- Failed to start launchd_sim: could not bind to session, launchd_sim may have crashed or quit responding Domain: com.apple.SimLaunchHostService.RequestError Code: 4 -- Analytics Event: com.apple.dt.IDERunOperationWorkerFinished : { "device_model" = "iPhone15,2"; "device_osBuild" = "16.2 (20C52)"; "device_platform" = "com.apple.platform.iphonesimulator"; "launchSession_schemeCommand" = Run; "launchSession_state" = 1; "launchSession_targetArch" = "x86_64"; "operation_duration_ms" = 8341; "operation_errorCode" = 60; "operation_errorDomain" = NSPOSIXErrorDomain; "operation_errorWorker" = "_IDEInstalliPhoneSimulatorWorker"; "operation_name" = IDERunOperationWorkerGroup; "param_consoleMode" = 0; "param_debugger_attachToExtensions" = 0; "param_debugger_attachToXPC" = 1; "param_debugger_type" = 3; "param_destination_isProxy" = 0; "param_destination_platform" = "com.apple.platform.iphonesimulator"; "param_diag_MainThreadChecker_stopOnIssue" = 0; "param_diag_MallocStackLogging_enableDuringAttach" = 0; "param_diag_MallocStackLogging_enableForXPC" = 1; "param_diag_allowLocationSimulation" = 1; "param_diag_checker_tpc_enable" = 1; "param_diag_gpu_frameCapture_enable" = 0; "param_diag_gpu_shaderValidation_enable" = 0; "param_diag_gpu_validation_enable" = 0; "param_diag_memoryGraphOnResourceException" = 0; "param_diag_queueDebugging_enable" = 1; "param_diag_runtimeProfile_generate" = 0; "param_diag_sanitizer_asan_enable" = 0; "param_diag_sanitizer_tsan_enable" = 0; "param_diag_sanitizer_tsan_stopOnIssue" = 0; "param_diag_sanitizer_ubsan_stopOnIssue" = 0; "param_diag_showNonLocalizedStrings" = 0; "param_diag_viewDebugging_enabled" = 1; "param_diag_viewDebugging_insertDylibOnLaunch" = 1; "param_install_style" = 0; "param_launcher_UID" = 2; "param_launcher_allowDeviceSensorReplayData" = 0; "param_launcher_kind" = 0; "param_launcher_style" = 0; "param_launcher_substyle" = 0; "param_runnable_appExtensionHostRunMode" = 0; "param_runnable_productType" = "com.apple.product-type.application"; "param_runnable_type" = 2; "param_testing_launchedForTesting" = 0; "param_testing_suppressSimulatorApp" = 0; "param_testing_usingCLI" = 0; "sdk_canonicalName" = "iphonesimulator16.2"; "sdk_osVersion" = "16.2"; "sdk_variant" = iphonesimulator; } -- System Information macOS Version 12.7.1 (Build 21G920) Xcode 14.2 (21534) (Build 14C18) Timestamp: 2025-06-29T08:16:35+02:00 I filed a bug report: FB18475006

I am trying to integrate fastlane, which relies on xcodebuild. So this is my first experience with xcodebuild. Whenever I run a command to test or build the target in the folder where all the files of the project are stored, the action failes with Unable to find a device matching the provided destination specifier For example I might be running this command: xcodebuild \ -project Hoerspielzentrale.xcodeproj \ -scheme HoerspielzentraleUITests \ -destination 'platform=iOS Simulator,name="Screenshot Simulator”' \ test However the mentioned error is returned: xcodebuild: error: Unable to find a device matching the provided destination specifier: { platform:iOS Simulator, OS:latest, name:"Screenshot Simulator” } The requested device could not be found because no available devices matched the request. I can confirm that the simulator exists, is available and it can be booted. I have tried different simulators, different schemas, referencing them by their identifier, switching Xcode Versions, reset all simulators, derived data and build folder. After the error a complete list of all available destinations can be found, where I can see the simulator I try to use. Available destinations for the "HoerspielzentraleUITests" scheme: { platform:iOS, id:dvtdevice-DVTiPhonePlaceholder-iphoneos:placeholder, name:Any iOS Device } { platform:iOS Simulator, id:dvtdevice-DVTiOSDeviceSimulatorPlaceholder-iphonesimulator:placeholder, name:Any iOS Simulator Device } { platform:iOS Simulator, id:961DC569-9931-419A-B46E-769AAFA73EA2, OS:18.5, name:Screenshot Simulator } { platform:iOS Simulator, id:961DC569-9931-419A-B46E-769AAFA73EA2, OS:18.5, name:Screenshot Simulator } { platform:iOS Simulator, id:5E51FD98-C451-472F-9CDE-08D49E6B737B, OS:18.5, name:Screenshot Simulator Pro } { platform:iOS Simulator, id:5E51FD98-C451-472F-9CDE-08D49E6B737B, OS:18.5, name:Screenshot Simulator Pro } The rest of the list was omitted. I am currently completely stuck. Thank you

Apple claims you can share files to the Xcode simulator. The first step works (share-to-simulator context menu exists). But when you execute this nothing happens. This contradicts the apple documentation which states: a Simulator opens the Files app, and lets you select where to save the files. If I instead try to drag and drop between the Mac and the simulator's file manger I receive the message: Simulator device failed to open file:///Users/me/Downloads/Exchange/ExampleExport.json. So what is the trick? Is there a missing authorisation that I need to set in the simulator's settings for example? MacOS: 15.5 Xcode: 16.4 (16F6) ... the latest stable Apple versions.

I've tried deleting and reinstalling the beta deleting and re-adding the iOS support deleting and re-adding all the simulators clearing DerivedData and CoreSimulator/Caches rebooting waiting a little while and rebuilding Nothing works. Anyone else had any success?

In Simulator Korean character system has not working well. I want to type "", however, if I type the same thing on the simulator's virtual keyboard (Korean), it comes out as ''. I think this is caused by IME system in ios simulator bug. I think this has been happening since IOS 17.

I can see that iOS beta 2 was released yesterday. I'm not running the beta yet on my actual iPhone, but I wanted to see if an issue I reported in beta 1 was fixed. Is there a way to update my iOS 26 simulator for beta 2? Usually, there's a new Xcode download that includes the new simulator, but it looks like the most recent Xcode beta release was June 9.

New betas of the platforms were released today (June 23), but I don't see any update for Xcode. Is there a way to get the Xcode 26 beta 1 to install the beta2 OSes for the simulator somehow? Or do we simply need to wait for an update?

Hi, I am having an issue with xcodebuild -showdestinations command. Steps to reproduce: Create a new iOS application project in Xcode or use an existing one. Navigate to this project in a terminal. Run xcodebuild -project 'your-project-name.xcodeproj' -scheme 'your-scheme' -showdestinations What I expect: All destinations available in the Xcode UI should be listed. What I get: It depends. For new projects, I consistently get only generic platform destinations and my connected physical device. When I run the same command on an older project, I sometimes see all the expected destinations. It seems to be a roughly 50/50 chance between the two outcomes. Is there a way to get consistent results from xcodebuild -showdestinations? What can I do to ensure all destinations are listed reliably? Here is a more detailed log and a screenshot: ❯ xcodebuild -workspace 'WorkoutDiary.xcworkspace' -scheme 'WorkoutDiary' -showdestinations Command line invocation: /Applications/Xcode.app/Contents/Developer/usr/bin/xcodebuild -workspace WorkoutDiary.xcworkspace -scheme WorkoutDiary -showdestinations User defaults from command line: IDEPackageSupportUseBuiltinSCM = YES 2025-06-17 19:13:50.261 xcodebuild[34753:6177985] DVTDeviceOperation: Encountered a build number "" that is incompatible with DVTBuildVersion. 2025-06-17 19:13:50.342 xcodebuild[34753:6177959] [MT] DVTDeviceOperation: Encountered a build number "" that is incompatible with DVTBuildVersion. Resolve Package Graph Resolved source packages: <REDACTED> Available destinations for the "WorkoutDiary" scheme: { platform:macOS, arch:arm64, variant:Designed for [iPad,iPhone], id:<REDACTED>, name:My Mac } { platform:iOS, arch:arm64, id:<REDACTED>, name:<REDACTED> } { platform:iOS, id:dvtdevice-DVTiPhonePlaceholder-iphoneos:placeholder, name:Any iOS Device } { platform:iOS Simulator, id:dvtdevice-DVTiOSDeviceSimulatorPlaceholder-iphonesimulator:placeholder, name:Any iOS Simulator Device } ❯ xcodebuild -workspace 'WorkoutDiary.xcworkspace' -scheme 'WorkoutDiary' -showdestinations Command line invocation: /Applications/Xcode.app/Contents/Developer/usr/bin/xcodebuild -workspace WorkoutDiary.xcworkspace -scheme WorkoutDiary -showdestinations User defaults from command line: IDEPackageSupportUseBuiltinSCM = YES 2025-06-17 19:13:52.393 xcodebuild[34757:6178035] DVTDeviceOperation: Encountered a build number "" that is incompatible with DVTBuildVersion. 2025-06-17 19:13:52.472 xcodebuild[34757:6178020] [MT] DVTDeviceOperation: Encountered a build number "" that is incompatible with DVTBuildVersion. Resolve Package Graph Resolved source packages: <REDACTED> Available destinations for the "WorkoutDiary" scheme: { platform:macOS, arch:arm64, variant:Designed for [iPad,iPhone], id:<REDACTED>, name:My Mac } { platform:iOS, arch:arm64, id:<REDACTED>, name:<REDACTED> } { platform:iOS, id:dvtdevice-DVTiPhonePlaceholder-iphoneos:placeholder, name:Any iOS Device } { platform:iOS Simulator, id:dvtdevice-DVTiOSDeviceSimulatorPlaceholder-iphonesimulator:placeholder, name:Any iOS Simulator Device } { platform:iOS Simulator, id:DBFB9613-0261-4544-908A-335570F3C35F, OS:18.3.1, name:iPhone 11 } { platform:iOS Simulator, id:A48C309C-231A-4197-A295-900F89C94D86, OS:18.3.1, name:iPhone 16 Pro Max }

I'm using Network framework for communication between devices. The first time I instantiate an NWBrowser, it will prompt the user with a popup that says: Allow &lt;app name&gt; to find devices on local networks? The problem is, once I upgraded from Xcode 15.4 to Xcode 16.4, the popup doesn't appear; it says in the debug window: nw_browser_fail_on_dns_error_locked [B1] nw_browser_dns_service_browse_callback failed: PolicyDenied(18,446,744,073,709,486,046) I do have the info.plist keys Privacy-Local Network Usage Description (NSLocalNetworkUsageDescription) and Bonjour Services (NSBonjourServices) so it's not that. Also, It still works on a real device. I think something changed with Xcode 16 that tightened the security on a simulator, or maybe disabled Network framework entirely. It's not the firewall on my computer because that is turned off. I'm using an M1 MacBook Pro.