title: Unable to boot the iOS Simulator; launchd failed to respond
body: <p>I have the problem that when I launch the simulator, a black screen appears with the message:
  "Unable to boot the iOS Simulator".
  I'm using Xcode 6.4 with iOS 8.4 Simulator.</p>
  
  <p>I have tried several solutions that are proposed on other threads, but nothing works.
  (launchd.conf not found on my system) 
  Is there any solution without reinstalling Xcode/OS X?</p>
  
  <p>Log-File:</p>
  
  <blockquote>
    <p>Jul  8 15:10:07 WMUCM482679 CoreSimulatorService[793] : Could
    not register service com.apple.PowerManagement.control:
    launch_sim_register_endpoint: 0xfffffecc Jul  8 15:10:17 WMUCM482679
    CoreSimulatorService[793] : Could not register service
    com.apple.SystemConfiguration.configd_host:
    launch_sim_register_endpoint: 0xfffffecc Jul  8 15:10:27 WMUCM482679
    CoreSimulatorService[793] : Could not register service
    com.apple.audio.coreaudiod: launch_sim_register_endpoint: 0xfffffecc
    Jul  8 15:10:37 WMUCM482679 CoreSimulatorService[793] : Could
    not register service com.apple.SystemConfiguration.PPPController:
    launch_sim_register_endpoint: 0xfffffecc Jul  8 15:10:37 WMUCM482679
    CoreSimulatorService[793] : Could not register service
    com.apple.audio.audiohald: launch_sim_register_endpoint: 0x44e Jul  8
    15:10:37 WMUCM482679 CoreSimulatorService[793] : Could not
    register service
    com.apple.coreservices.lsuseractivity.simulatorsupport:
    launch_sim_register_endpoint: 0x44e Jul  8 15:10:37 WMUCM482679
    CoreSimulatorService[793] : Could not register service
    com.apple.FSEvents: launch_sim_register_endpoint: 0x44e Jul  8
    15:10:37 WMUCM482679 CoreSimulatorService[793] : Could not
    register service com.apple.SystemConfiguration.configd:
    launch_sim_register_endpoint: 0x44e Jul  8 15:10:37 WMUCM482679
    CoreSimulatorService[793] : Could not register service
    IndigoHIDRegistrationPort: launch_sim_register_endpoint: 0x44e Jul  8
    15:10:37 WMUCM482679 CoreSimulatorService[793] : Could not
    register service PurpleFBTVOutServer: launch_sim_register_endpoint:
    0x44e Jul  8 15:10:37 WMUCM482679 CoreSimulatorService[793] :
    Could not register service PurpleFBServer:
    launch_sim_register_endpoint: 0x44e Jul  8 15:10:37 WMUCM482679
    CoreSimulatorService[793] : Error Domain=NSPOSIXErrorDomain
    Code=60 "Unable to boot the iOS Simulator." UserInfo=0x7f8c70d18fd0
    {NSLocalizedDescription=Unable to boot the iOS Simulator.,
    NSLocalizedFailureReason=launchd failed to respond.} Jul  8 15:10:37
    WMUCM482679 CoreSimulatorService[793] : Error
    Domain=NSPOSIXErrorDomain Code=60 "Unable to boot the iOS Simulator."
    UserInfo=0x7f8c70d18fd0 {NSLocalizedDescription=Unable to boot the iOS
    Simulator., NSLocalizedFailureReason=launchd failed to respond.} Jul 
    8 15:10:37 WMUCM482679 com.apple.iphonesimulator[902] : Error
    Domain=NSPOSIXErrorDomain Code=60 "Unable to boot the iOS Simulator."
    UserInfo=0x7fcf53a01aa0 {NSLocalizedDescription=Unable to boot the iOS
    Simulator., NSLocalizedFailureReason=launchd failed to respond.} Jul 
    8 15:10:37 WMUCM482679 CoreSimulatorService[793] : Error
    Domain=com.apple.CoreSimulator.SimError Code=146 "Unable to lookup in
    current state: Shutdown" UserInfo=0x7f8c70d18fd0
    {NSLocalizedDescription=Unable to lookup in current state: Shutdown}
    Jul  8 15:10:37 WMUCM482679 CoreSimulatorService[793] : Error
    looking up host support port</p>
  </blockquote>