Hi all, we do have the same problem. Me and several other colleagues. We just found out the same that iOS Simulator version 18.2 is the latest working for us. We have also tried to clean everything and start the installation from scratch. It did not help. I throw my stack trace here as well in the hope it might be seen and it might help some developer at Apple. Unable to boot the Simulator. Domain: NSPOSIXErrorDomain Code: 4 Failure Reason: Interrupted system call User Info: { DVTErrorCreationDateKey = "2026-01-14 08:42:36 +0000"; IDERunOperationFailingWorker = "_IDEInstalliPhoneSimulatorWorker"; Session = "com.apple.CoreSimulator.SimDevice.79733B3C-A5BA-41E8-A88A-6DA408E517D6"; } -- 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 -- Event Metadata: com.apple.dt.IDERunOperationWorkerFinished : { "device_identifier" = "XXX"; "device_model" = "iPhone17,5"; "device_osBuild" = "26.0 (23A339)"; "device_osBuild_monotonic" = 2300033900; "device_os_variant" = 1; "device_platform" = "com.apple.platform.iphonesimulator"; "device_platform_family" = 2; "device_reality" = 2; "device_thinningType" = "iPhone17,5"; "device_transport" = 4; "launchSession_schemeCommand" = Run; "launchSession_schemeCommand_enum" = 1; "launchSession_targetArch" = arm64; "launchSession_targetArch_enum" = 6; "operation_duration_ms" = 975; "operation_errorCode" = 4; "operation_errorDomain" = NSPOSIXErrorDomain; "operation_errorWorker" = "_IDEInstalliPhoneSimulatorWorker"; "operation_error_reportable" = 1; "operation_name" = IDERunOperationWorkerGroup; "param_consoleMode" = 1; "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_MTE_enable" = 0; "param_diag_MainThreadChecker_stopOnIssue" = 0; "param_diag_MallocStackLogging_enableDuringAttach" = 0; "param_diag_MallocStackLogging_enableForXPC" = 1; "param_diag_allowLocationSimulation" = 1; "param_diag_checker_mtc_enable" = 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_guardMalloc_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_enable" = 0; "param_diag_sanitizer_ubsan_stopOnIssue" = 0; "param_diag_showNonLocalizedStrings" = 0; "param_diag_viewDebugging_enabled" = 1; "param_diag_viewDebugging_insertDylibOnLaunch" = 1; "param_install_style" = 2; "param_launcher_UID" = 2; "param_launcher_allowDeviceSensorReplayData" = 0; "param_launcher_kind" = 0; "param_launcher_style" = 0; "param_launcher_substyle" = 0; "param_lldbVersion_component_idx_1" = 0; "param_lldbVersion_monotonic" = 170302340003; "param_runnable_appExtensionHostRunMode" = 0; "param_runnable_productType" = "com.apple.product-type.application"; "param_testing_launchedForTesting" = 0; "param_testing_suppressSimulatorApp" = 0; "param_testing_usingCLI" = 0; "sdk_canonicalName" = "iphonesimulator26.1"; "sdk_osVersion" = "26.1"; "sdk_platformID" = 7; "sdk_variant" = iphonesimulator; "sdk_version_monotonic" = 2301007700; } -- System Information macOS Version 15.7.3 (Build 24G419) Xcode 26.1.1 (24455) (Build 17B100) Timestamp: 2026-01-14T09:42:36+01:00