Xcode16.x+ios18.x simulator crashing and tests are failing

Question

Created May ’25

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We are seeing crashes after upgrading to xcode16.x ( tested with 16.1 , 16.2 and 16.3) and ios 18.1, 18.2, 18.3.1 and 18.4 . when tests are running simulator is crashing with mulitple reasons.

CoreSimulatorService[85444] <Error>: Failed to get a device identity for simulator device BFAD684E-A48A-4170-80E1-8FBC04744E79, error: Error Domain=com.apple.MobileActivation.ErrorDomain Code=-1 "Failed to create BAA info." UserInfo={NSLocalizedDescription=Failed to create BAA info., NSUnderlyingError=0x600002072a60 {Error Domain=com.apple.MobileActivation.ErrorDomain Code=-1 "Failed to query baa info." UserInfo={NSLocalizedDescription=Failed to query baa info., NSUnderlyingError=0x600002073390 {Error Domain=com.apple.MobileActivation.ErrorDomain Code=-1 "Failed to load cryptex1 manifest." UserInfo={NSLocalizedDescription=Failed to load cryptex1 manifest., NSUnderlyingError=0x600002071110 {Error Domain=com.apple.MobileActivation.ErrorDomain Code=-1 "Failed to load firmware data from /System/Volumes/iSCPreboot/F743DA4B-92E7-4E92-ACD2-40775DF4B5A2/cryptex1/current/apticket.j274ap.1A256C21D3001E.im4m." UserInfo=0x600003b47bc0 (not displayed)}}}}}}

sometimes crashing with


[02:47:24]: ▸ 	Tests_iOS-Runner encountered an error (Failed to prepare device 'Clone 2 of iPhone 16 Pro' for impending launch. (Underlying Error: Unable to boot the Simulator. launchd failed to respond. (Underlying Error: Failed to start launchd_sim: could not bind to session, launchd_sim may have crashed or quit responding)))

sometimes with


[18:44:47]: ▸ 2025-05-08 18:44:47.019 xcodebuild[75752:6252304] [MT] IDELaunchReport: a616bd895a3ee240:a616bd895a3eec00:Install Actions Finished with error: Unable to boot the Simulator.

[18:44:47]: ▸ Domain: NSPOSIXErrorDomain

[18:44:47]: ▸ Code: 60

[18:44:47]: ▸ Failure Reason: launchd failed to respond.

[18:44:47]: ▸ User Info: {

[18:44:47]: ▸     Session = "com.apple.CoreSimulator.SimDevice.BD4A5DAB-3317-44D1-AFD1-C6EED090BB20";

[18:44:47]: ▸ }

[18:44:47]: ▸ --

[18:44:47]: ▸ Failed to start launchd_sim: could not bind to session, launchd_sim may have crashed or quit responding

[18:44:47]: ▸ Domain: com.apple.SimLaunchHostService.RequestError

[18:44:47]: ▸ Code: 4

[18:44:47]: ▸ --

[18:44:47]: ▸ 2025-05-08 18:44:47.019 xcodebuild[75752:6252304] [MT] IDELaunchReport: a616bd895a3ee240:a616bd895a3eec00:Install Actions com.apple.dt.IDERunOperationWorkerFinished {

[18:44:47]: ▸     "operation_duration_ms" = 55114;

[18:44:47]: ▸     "operation_errorCode" = 60;

[18:44:47]: ▸     "operation_errorDomain" = NSPOSIXErrorDomain;

[18:44:47]: ▸     "operation_name" = "_IDEInstalliPhoneSimulatorWorker";

[18:44:47]: ▸ }

sometimes crashing with


	Run test suite Tests2 encountered an error (Early unexpected exit, operation never finished bootstrapping - no restart will be attempted. (Underlying Error: Test crashed with ****** term before starting test execution.))

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