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
Check for iCloud storage plan!
If you do have one, it constantly syncs the entire computer which includes Desktop and Document folders. Instead try creating a "Local Files" folder in your Home folder(command+shift+h) and keep your Playground projects there, where it doesn't sync to iCloud.
This worked for me.I hope this works for you as well! :)