Open Radar

 
Steps to Reproduce:
Open Xcode and create a new playground.
You can also use a playground from this project:
https://github.com/Swinject/Swinject/archive/master.zip

Open the playground file in Xcode and run the playground

Expected Results:
Playground runs normally

Actual Results:
First I see a spinner in the Xcode toolbar and the label "Launching Simulator"

Then Xcode shows the message:
"Failed to launch process. The operation could not be completed. Mach error -308 - (pic/mig) server died.


CoreSimulator.log gets the following errors:

Mar 28 14:49:43 sergey-macbook CoreSimulatorService[8089] <Error>: Error from finding pasteboard support port, Error Domain=com.apple.CoreSimulator.SimError Code=163 "Unable to lookup in current state: Shutting Down" UserInfo={NSLocalizedDescription=Unable to lookup in current state: Shutting Down}
Mar 28 14:49:43 sergey-macbook CoreSimulatorService[8089] <Error>: Error Domain=com.apple.CoreSimulator.SimError Code=163 "Unable to lookup in current state: Shutting Down" UserInfo={NSLocalizedDescription=Unable to lookup in current state: Shutting Down}
Mar 28 14:49:43 sergey-macbook CoreSimulatorService[8089] <Error>: Error Domain=com.apple.CoreSimulator.SimError Code=163 "Unable to lookup in current state: Shutting Down" UserInfo={NSLocalizedDescription=Unable to lookup in current state: Shutting Down}
Mar 28 14:49:43 sergey-macbook com.apple.dt.Xcode[8098] <Error>: Error Domain=NSPOSIXErrorDomain Code=53 "Software caused connection abort" UserInfo={NSLocalizedDescription=Error returned in reply: Connection interrupted}
Mar 28 14:49:43 sergey-macbook com.apple.dt.Xcode[8098] <Error>: Error from finding pasteboard support port, Error Domain=NSPOSIXErrorDomain Code=53 "Software caused connection abort" UserInfo={NSLocalizedDescription=Error returned in reply: Connection interrupted}




Version:
Xcode 8.3 (8E162)

MacOS Sierra 10.12.4 Beta (16E175b)

Notes:


Configuration:
This problem happens with new playgrounds and with existing ones as well
(E.g. with the playground from https://github.com/Swinject/Swinject/archive/master.zip)

Things I tried:

- Completely remove Xcode and install it again.
- Add/remove Simulator runtimes.

This problem is not limited to this specific version of Xcode - I experienced it with Xcode 8.2 as well.

No matter what I do I cannot get playgrounds to work.