xcode 9 simulator error unable to boot the simulator launchd failed to respond mac os sierra

Question

xcode 9 simulator error unable to boot the simulator launchd failed to respond mac os sierra

I ave tried deleting contents from derived data, restarting Xcode , Un

Answer 1

In this case, launchd is crashing when trying to launch.

This could be as a result of deleting the /private/tmp folder.

To resolve this, I typed the following commands on my terminal:

sudo mkdir /private/tmp 
sudo chmod 1777 /private/tmp