Unable to boot simulator XCode 8

Question

I have tried all the solutions which found on stack overflow, but still not able to resolve it. Somehow its not open the simulator and gives me error \"unable to boot simula

Answer 1

Problems:

As I also faced the same problem as below..

--"Unable to boot simulator" --Storyboard designs/views completely invisible and showing only blue lines. --CoreTelephony Trace File Error ... failed to create \tmp

Solutions

Don't do any SIP (Disable/Enable)settings its just temp solutions & it may harms to other applications in the mac as well as may affecting on secure data in the mac. Best way to do upgrade your iMac to macOS "Sierra". It will solve all your problems.

Finally I am able to work on my project by solving above strange problems.

Happy coding.. happy Development...!!!