title: Xcode 8 simulator extremely slow
body: <p>I am running Xcode 8 on macOS Sierra 10.12.2, and there seems to be a problem with running the simulator on my first "Hello World!" app (simulating iPhone 7 Plus). As you can see, I am very new at app development.</p>
  
  <p>The simulator gets stuck at the loading bar with the Apple logo for about 10 to 15 minutes, and then gives me the message of "The operation couldn't be completed. (Mach error -308 - (ipc/mig) server died)".</p>
  
  <p>I dug around the web and found solutions suggesting to go to Product > Clean in Xcode, also Simulator > Reset Content and Settings... in Simulator. </p>
  
  <p>After which, the system gets stuck at the spinning clock for about 20 minutes and gives me the error message "Unable to contact local DTServiceHub to bless simulator connection" (solution I found online tells me to "Reset Content and Settings...")</p>
  
  <p>I'm just really lost here because the error codes seems inconsistent in ways I cannot explain. Maybe it is my laptop? (Early 2011 MacBook Pro 15" 4GB ram, 2.2GHz Corei7)</p>
  
  <p>Thank you in advance for your effort to help me.</p>