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

Try to turn off System Integrity Protection http://www.imore.com/el-capitan-system-integrity-protection-helps-keep-malware-away - it helped me.

Answer 2

Assuming the error message was actually "Unable to boot the Simulator.", this error indicates an error starting up launchd_sim when booting the simulated device. In and of itself, it does not indicate the actual cause. You can look in ~/Library/Logs/CoreSimulator/CoreSimulator.log for more information about the error (including the error reason).

Possible causes:

1. On OSX 10.9 and earlier, DYLD_INSERT_LIBRARIES could be set by 3rd party applications. On later versions, invalid DYLD_INSERT_LIBRARIES are ignored instead of resulting in an error.

2. Usage of older simulator runtime DLC with Xcode 7 betas. Newer versions of Xcode ignore these older DLC.

If you need additional help, please provide that additional datum.

Also see my answer in the related question: Please see my answer on launchd_sim crashing: could not create temporary state directory regarding data you can collect to help further triage the problem.

Answer 3

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...!!!