Xcode playground gets stuck on 'Running playground' or 'Launching simulator' and won't run the code, what to do?

Question

Every time I create a new playground in order to test some code, Xcode gets stuck and won\'t run the code. It simply presents \'Running playground\' or \'Launching simulator

Answer 1

Make sure you kill xcode in the activity monitor before eventually killing com.apple.CoreSimulator.CoreSimulatorService process in the activity monitor. I tried killing the process a number of times and I realized if xcode is still running in the background activity then the com.apple.CoreSimulator.CoreSimulatorService process would pop up again even when you just killed it.