I had this issue in Xcode 26 too. I've since downloaded the Xcode 27 beta 3 and still have the same issue. iPhone connected via USB C cable Watch has development mode enabled Every device on same WiFi network No VPN connected 90% of the time it's the same error, on rare occasions it does actually work. Very strange. Domain: com.apple.dt.CoreDeviceError Code: 4000 User Info: { DVTErrorCreationDateKey = "2026-07-14 16:08:25 +0000"; DVTRadarComponentKey = 985505; IDERunOperationFailingWorker = IDEInstallCoreDeviceWorker; "com.apple.dt.DVTCoreDevice.operationName" = connect; } -- Timed out while attempting to establish tunnel using negotiated network parameters. Domain: com.apple.dt.RemotePairingError Code: 1001 Recovery Suggestion: Ensure the device is accessible from this machine over an infrastructure network, or ensure WiFi is enabled on both machines. -- Event Metadata: com.apple.dt.IDERunOperationWorkerFinished : { "device_identifier" = "00008301-088D1C383AFBC02E"; "device_isCoreDevice" = 1; "device_model" = "Watch6,18"; "device_osBuild" = "26.5 (23T570)"; "device_osBuild_monotonic" = 23019570000000000; "device_os_variant" = 1; "device_platform" = "com.apple.platform.watchos"; "device_platform_family" = 3; "device_reality" = 0; "device_thinningType" = "Watch6,18"; "device_transport" = 2; "launchSession_schemeCommand" = Run; "launchSession_schemeCommand_enum" = 1; "launchSession_targetArch" = "arm64_32"; "launchSession_targetArch_enum" = 5; "operation_duration_ms" = 11793; "operation_errorCode" = 1001; "operation_errorDomain" = "com.apple.dt.CoreDeviceError.4000.com.apple.dt.RemotePairingError"; "operation_errorWorker" = IDEInstallCoreDeviceWorker; "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.watchos"; "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" = 0; "param_diag_runtimeProfile_generate" = 0; "param_diag_sanitizer_asan_enable" = 0; "param_diag_sanitizer_mtasan_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" = 99; "param_launcher_substyle" = 0; "param_lldbVersion_component_idx_1" = 0; "param_lldbVersion_monotonic" = 210300260101; "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" = "watchos27.0"; "sdk_osVersion" = "27.0"; "sdk_platformID" = 4; "sdk_variant" = watchos; "sdk_version_monotonic" = 24017315005000008; } -- System Information macOS Version 26.5.2 (Build 25F84) Xcode 27.0 (25183.54.10) (Build 27A5218g) Timestamp: 2026-07-14T18:08:25+02:00