Hello, When trying to download the latest version of iOS simulator on xCode i get this error: Download failed. Domain: DVTDownloadableErrorDomain Code: 41 User Info: { DVTErrorCreationDateKey = "2025-02-21 09:05:50 +0000"; } Download failed. Domain: DVTDownloadableErrorDomain Code: 41 Failed fetching catalog for assetType (com.apple.MobileAsset.iOSSimulatorRuntime), serverParameters ({ RequestedBuild = 22D8075; }) 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 15.0 (Build 24A335) Xcode 16.2 (23507) (Build 16C5032a) Timestamp: 2025-02-21T11:05:50+02:00

I'm testing web extension to safari on iOS. I've built and added extension application to simulator, but on safari settings shows no extensions. I'm using Xcode 16.3 beta 2 with Simulator iOS 18.4 (22E5216h), tested on iPhone 16. https://app.screencast.com/oUq4EMonmfT7u https://app.screencast.com/MCquvHzmZi8QS

I'm seeing fully reproducible issues with URLSession on iOS 18.4 RC Simulator running from Xcode 16.3 RC. URLSession seems to get into a broken state after a second app run. The following sample succeeds in fetching the JSON on first app run but when the app is closed and ran again it fails with one of these errors: Error: Error Domain=NSURLErrorDomain Code=-1005 "The network connection was lost." Error: Error Domain=NSURLErrorDomain Code=-1001 "The request timed out." I'm wondering if this something related to my OS setup or is this due to internal URLSession changes in iOS 18.4. Already submitted as FB17006003. Sample code attached below: import SwiftUI @main struct NetworkIssue18_4App: App { var body: some Scene { WindowGroup { ContentView() } } } struct ContentView: View { @State private var message: String = "" var body: some View { VStack { Text(message) Button("Try Again") { Task { await fetch() } } } .task { await fetch() } } private func fetch() async { message = "Loading..." let url = URL(string: "https://poetrydb.org/title/Ozymandias/lines.json")! let session = URLSession.shared do { let response = try await session.data(from: url) print("Response: \(response)") message = "Success, data length: \(response.0.count)" } catch { print("Error: \(error)") message = "Error: \(error.localizedDescription)" } } }

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

Is anyone else receiving this warning from Xcode when running on the Simulator? "Failed retrieving MusicKit tokens: fetching the developer token is not supported in the simulator when running on this version of macOS; please upgrade your Mac to macOS Ventura." My Mac is already updated to macOS Sequoia, and I'm also running the latest version of Xcode. Feedback: FB17150538

Hello, I'm experiencing an issue where WKWebView consistently fails to load a specific URL on the iOS 18.4 simulator (Xcode 16.3). The error is as follows: Error Domain=NSURLErrorDomain Code=-1005 "The network connection was lost." UserInfo={ _kCFStreamErrorCodeKey=-4, _kCFStreamErrorDomainKey=4, NSUnderlyingError=Error Domain=kCFErrorDomainCFNetwork Code=-1005, NSErrorFailingURLKey=[REDACTED] } Key Observations: This URL fails consistently only on the iOS 18.4 simulator. The same URL loads without issue in iOS 18.3 and 18.2 simulators. The backend is serving a valid HTTPS certificate chain, and the server appears to be presenting it properly. The same application appears to work on a real iPhone running 18.4. Certificate Chain for the Failing URL Leaf: WR3 (Valid: Mar 17, 2025 – Jun 15, 2025) Intermediate 1: GTS Root R1 (Valid: Dec 13, 2023 – Feb 20, 2029) Intermediate 2: GlobalSign Root CA (Valid: Jun 19, 2020 – Jan 28, 2028) Other URLs Work Fine in iOS 18.4 Simulator WKWebView successfully loads the following URLs with similar or more complex certificate chains: https://google.com → WR2, GTS Root R1, GlobalSign Root CA https://amazon.com → DigiCert Global CA G2, DigiCert Global Root G2, VeriSign G5 https://stackoverflow.com → E5, ISRG Root X1 https://shopify.com → GlobalSign Root CA, GTS Root R4, WE1 This suggests the issue may not be with general network or certificate trust but instead something specific about how iOS 18.4 handles this domain or certificate configuration in the simulator. Any insights on how to solve this would be greatly 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

Hello! I was faced with unexpected behavior of hardware keyboard focus in UITests. A clear description of the problem When running UITests on the iOS Simulator with both "Full Keyboard Access" and "Connect Hardware Keyboard" options enabled, there is a noticeable delay between keyboard actions for focus managing (like pressing Tab or arrow keys). The delay seems to increase with repeated input and suggests that events are being queued instead of processed immediately. I will describe why I have such an assumption later. A step-by-step set of instructions to reproduce the problem Launch the iOS Simulator. Enable both "Full Keyboard Access" and "Connect Hardware Keyboard" in the Simulator settings. Run a UITest on a target application (ideally an endless or long-running test). Once the app is launched, press the Tab key several times. Observe the delay in focus movement. Optionally, press the Tab or arrow keys rapidly, then stop the UITest. After stopping, you’ll see a burst of rapid focus changes. What results you expected We expected keyboard actions (like Tab) to be handled immediately and the UI focus to update smoothly during UITests. What results you saw There was a 4–10 (end more) second delay between pressing keys and seeing a response. All stacked keyboard events (used for managing focus) are performed all at once after stopping the UITest. The version of Xcode you are using Xcode: Version 16.3 (16E140) Simulator: iPhone 16 Pro (iOS 18.4 and 18.1) Simulator: iPad Pro 11-inch (M4) (iPadOS 17.5)

It seems like this is not supported in the Simulator because when I run my Unit tests and I try to read protection key-value the value is always nil, even if I set the data protection level when I write the file. On device this key returns the expected value. Is it possible to have the simulator support the data protection classes to run my unit tests? FYI Im testing on iOS

Build and run on simulator is suddenly very slow since Xcode 16.3. The build is normal, but the run part launches the simulator and sits and waits 5, 10, 15, sometimes 20 seconds before anything happens. During that time, the screen is blank on the simulator and the console output is blank in Xcode. What's going on here? Is there a fix or work-around? EDIT: If I turn off the debugger, so it just runs without attaching it, the launch happens instantly.

Xcode 16.3 simulator slow to load - unusable

Inside /Library/Developer/CoreSimulator I have 26GB (according to du -h) of old data that Xcode won't list under Window -> Devices & Simulators. Because of Apples decision to not let even the root user write in this directory I am unable to delete them with rm -r * or put them in the trash etc. The old runtimes are even listed in disk utility and can't be unmounted or delete from there - also due to missing permissions. How can I get rid of this if even Xcode won't list them? Also tried xcrun simctl delete all without success.

When I use Xcode to develop the apps, the connection to my own Apple Watch is failed. The simulator has been downloaded, but it still displayed"watchOS10.0 Not Installed". The developer options were opened, I click the"trust this computer" but it always display"Connecting to *** Apple Watch". My iPhone can be connected normally.

I have Xcode on my mac. I am iOS Dev. I do not know what version of Xcode was before I did next steps, but I could say that I had iOS Simulator 18.3.1. So I update my Xcode to Version 16.3 (16E140). At this version is available iOS Simulator 18.4. But from some time before Xcode separate downloading components and actual Xcode itself. So i make update and do not download latest iOS simulator. What i have: in Xcode -> Settings -> Components under " Other Installed Platforms" i have iOS 18.3.1 and 17.5 in Choose Destination dropdown menu i have nothing. And Xcode say me that i need install iOS Simulator. After some time with ChatGPT I could not do nothing from this. I try go to : Window -> Device and Simulators and here create new simulator with 18.3.1 and make it appear Always. But it didn't help. Solution I did: I download latest version 18.4 because i could not wait because i need fix bug only 1 hour shift and it was this hour so i fast download the simulator. After downloading 18.4 in Choose Destination dropdown it appears all versions of simulaors and 18.3.1 and that i created and 17.5 Question: Does Xcode force to install latest version of iOS simulator? What is the sense of this upgrade that now Xcode is updating faster because it download 8 GB not 16 if eventually I need download 8 GB again ? The new what i could do download Xcode in the evening and Simulator in the morning?

Hi, We are facing issues on ios simulators os version 18, "Simulator device failed to install the application. Failed to create promise. Underlying error (domain=IXErrorDomain, code=2):" Due to this error simulator is unable to install the application. we are facing this intermittently. xcode version : Xcode.16.0.0.16A242d.app ios simulator runtime : com.apple.CoreSimulator.SimRuntime.iOS-18-0 ios simulator : com.apple.CoreSimulator.SimDeviceType.iPhone-16 mac os version : macOS 15.4 we have tried upgrading to xcode Xcode.16.1.0.16B40.app and ios simulator runtime to 18.1 but its not working. Also we have rebooted xcode, not helping. *Exact error message : ** org.openqa.selenium.SessionNotCreatedException: Could not start a new session. Response code 500. Message: An unknown server-side error occurred while processing the command. Original error: Error running 'install': An error was encountered processing the command (domain=IXErrorDomain, code=2): Simulator device failed to install the application. Failed to create promise. Underlying error (domain=IXErrorDomain, code=2): Failed to set icon resources promise for com.yyyy.xxxx Failed to create promise. Host info: host: 'uci-macmini-019lab3b.local', ip: 'fe80:0:0:0:1caf:6627:141d:f464%en0' Build info: version: '4.30.0', revision: '509c7f17cc' System info: os.name: 'Mac OS X', os.arch: 'aarch64', os.version: '15.3.1', java.version: '11.0.25' Driver info: com.mypackage.common.drivers.CustomIosDriver$ByteBuddy$g865VfU3 Command: [null, newSession {capabilities=[{appium:webviewConnectTimeout=120000, appium:autoAcceptAlerts=true, appium:app=/Users/mobileci/.buildkite-agent/builds/uci-macmini-019lab3b/mypackage/e2e-test-ios-simulator/8155f349-18b9-413c-9d17-dcb064986154/test_artifacts/target.app, appium:includeSafariInWebviews=true, appium:locale=US, appium:mjpegServerPort=52715, appium:newCommandTimeout=600000, appium:waitForIdleTimeout=3, appium:derivedDataPath=/Users/mobileci/.buildkite-agent/builds/uci-macmini-019lab3b/mypackage/e2e-test-ios-simulator/8155f349-18b9-413c-9d17-dcb064986154/appium_wda_ios/, appium:wdaConnectionTimeout=300000, appium:wdaLaunchTimeout=300000, appium:processArguments={env={E2E_TESTING=YES, RUN_UUID=8155f349-18b9-413c-9d17-dcb064986154}}, appium:automationName=XCUITest, appium:fullReset=true, appium:udid=F266ECC3-FD23-464D-B0C3-576EB48B2FF5, appium:deviceName=E2ESimulator, appium:wdaLocalPort=52714, appium:showXcodeLog=true, appium:webkitDebugProxyPort=52716, appium:noReset=false, appium:language=en, platformName=IOS, appium:simpleIsVisibleCheck=true}], desiredCapabilities=Capabilities {app: /Users/mobileci/.buildkite-..., autoAcceptAlerts: true, automationName: XCUITest, derivedDataPath: /Users/mobileci/.buildkite-..., deviceName: E2ESimulator, fullReset: true, includeSafariInWebviews: true, language: en, locale: US, mjpegServerPort: 52715, newCommandTimeout: 600000, noReset: false, platformName: IOS, processArguments: {env: {E2E_TESTING: YES, RUN_UUID: 8155f349-18b9-413c-9d17-dcb...}}, showXcodeLog: true, simpleIsVisibleCheck: true, udid: F266ECC3-FD23-464D-B0C3-576..., waitForIdleTimeout: 3, wdaConnectionTimeout: 300000, wdaLaunchTimeout: 300000, wdaLocalPort: 52714, webkitDebugProxyPort: 52716, webviewConnectTimeout: 120000}}] Capabilities {app: /Users/mobileci/.buildkite-..., autoAcceptAlerts: true, automationName: XCUITest, derivedDataPath: /Users/mobileci/.buildkite-..., deviceName: E2ESimulator, fullReset: true, includeSafariInWebviews: true, language: en, locale: US, mjpegServerPort: 52715, newCommandTimeout: 600000, noReset: false, platformName: IOS, processArguments: {env: {E2E_TESTING: YES, RUN_UUID: 8155f349-18b9-413c-9d17-dcb...}}, showXcodeLog: true, simpleIsVisibleCheck: true, udid: F266ECC3-FD23-464D-B0C3-576..., waitForIdleTimeout: 3, wdaConnectionTimeout: 300000, wdaLaunchTimeout: 300000, wdaLocalPort: 52714, webkitDebugProxyPort: 52716, webviewConnectTimeout: 120000} at

I just updated macOS to 15.4.1 and downloaded the latest version Xcode (16.3), and the simulator is not loading at all? Is this a common issue between Xcode 16.3 and macOS 15.4.1 or is it just me? I tried all the fixes I found online and it is just no working for me. Can someone please help me? Thanks!

I have a very specific issue that happens only on iOS Simulator version 18.4. It does NOT happen when I run my app on a real iOS 18.4 device through Testflight. My app displays a WebView (courtesy of Capacitor, url scheme capacitor://). Inside that Webview I'm using Firebase JS API (11.2.0) and calling signInWithEmailAndPassword, which works well in all other contexts, i.e. browser, Android webview, iOS webview in all other Simulator versions, and on real devices. Only when running in Simulator 18.4, I get a failed network request: cannot parse response Fetch API cannot load https://identitytoolkit.googleapis.com/v1/accounts:signInWithPassword?... due to access control checks. Failed to load resource: cannot parse reponse error: FirebaseError: (auth/network-request-failed) Everything is working correctly for both: Capacitor app webview installed on a real 18.4 device with Testflight Safari (non-webview) in the 18.4 Simulator The issue is severe for us, because we are unable to develop our app and test it in the simulator on 18.4 Simulator before pushing it through Testflight internal release. Request headers on the failed request (no response status or headers available). Request Accept: / Content-Type: application/json Origin: capacitor://localhost Sec-Fetch-Dest: empty Sec-Fetch-Mode: cors Sec-Fetch-Site: cross-site User-Agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_4 like Mac OS X) - AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/15E148 X-Client-Version: Mobile/JsCore/11.2.0/FirebaseCore-web X-Firebase-Client: (...)

There is an option in the iPhone Simulator If I select this : nothing happens . I have a Map in my App, and my location wont change , even if I wait 10 or 15 minutes. If i do a request to HealthKit , there is no walk/run samples.

When running UITests on tvOS, tabBar viewIdentifiers (UIKit) are no longer appearing. When you run the test, accessibility identifiers for tabs are no longer locatable but all other identifiers appears except for the tabs in the tabBar. In the stack trace of the debugger, if I print application, I can see all existing viewIdentifiers except those that were set for the tabs (on tvOS only). If I force an action on the simulator after the app has launched and the view appeared ie move left or right, the identifiers appears (confirmed by stack trace) and the test will continue as expected. This was not an issue in the past (no code changes). I am not sure if this appeared after updating my mac to Sequoia. But for iOS, there is no issue. This bug only appears on tvOS and specifically the tabs. Issue persists on: Sequoia 15.4.1 Xcode 16.3

I'm getting EXC_BAD_ACCESS (code=2, address=0x7ff8a6e2fcce) when launching my app on the simulator with Address or Thread Sanitizer enabled. I'm running Xcode 16.3 (16E140) on macOS Sequoia 15.4.1 (24E263). The call stack looks like the following. On the device, there is no crash, but this message is printed to the console: malloc: nano zone abandoned due to inability to reserve vm space. (Not sure if it's related.) Does anybody know what is causing the crash? Thread 1 #0 0x0000000103361f5b in __sanitizer::MemoryMappingLayout::Next () #1 0x000000010336034b in __sanitizer::MemoryRangeIsAvailable () #2 0x000000010334db77 in __asan::InitializeShadowMemory () #3 0x0000000103395069 in __asan::AsanInitInternal() (.cold.1) () #4 0x000000010334d352 in __asan::AsanInitInternal () #5 0x0000000103394f65 in __asan_init.cold.1 () #6 0x000000010334d325 in __asan::AsanInitFromRtl () #7 0x0000000103343289 in wrap_malloc_default_zone () #8 0x00007ff801b15f86 in __malloc_init () #9 0x00007ffa160080be in libSystem_initializer () #10 0x000000010306eb11 in invocation function for block in dyld4::Loader::findAndRunAllInitializers(dyld4::RuntimeState&) const () #11 0x000000010308f364 in invocation function for block in dyld3::MachOAnalyzer::forEachInitializer(Diagnostics&, dyld3::MachOAnalyzer::VMAddrConverter const&, void (unsigned int) block_pointer, void const*) const () #12 0x00000001030aad7c in invocation function for block in mach_o::Header::forEachSection(void (mach_o::Header::SectionInfo const&, bool&) block_pointer) const () #13 0x00000001030a83c9 in mach_o::Header::forEachLoadCommand () #14 0x00000001030a98c8 in mach_o::Header::forEachSection () #15 0x000000010308ef62 in dyld3::MachOAnalyzer::forEachInitializer () #16 0x000000010306e9ac in dyld4::Loader::findAndRunAllInitializers () #17 0x0000000103074da1 in dyld4::JustInTimeLoader::runInitializers () #18 0x00000001030807c5 in dyld4::APIs::runAllInitializersForMain () #19 0x000000010305efac in dyld4::prepare () #20 0x000000010305e36e in _dyld_sim_prepare () #21 0x000000010993b2a0 in dyld4::prepareSim () #22 0x0000000109939963 in dyld4::prepare () #23 0x000000010993981f in dyld4::start(dyld4::KernelArgs*, void*, void*)::$_0::operator()() const () #24 0x00000001099394da in start ()