Xcode 8.3.3 and 9.0b5 Runtime crashes in Simulators

I am attempting to learn Core Data programming and am using a tutorial from an eBook. I am getting some Runtime crashes (prior to the app displays), and I've tried valiantly to run a Clean Build but I haven't got the hang of it yet (my background is Microsoft and Unix not macOS) I know about Shift-Command-K and even Option-Shift-Command-K, but that doesn't clean up the Simulators properly. I've searched numerous locations both in Apple and from Google, but I'm not satisfied I am seeing correct UP-TO-DATE directions, for cleaning up the DerivedData and Simulators...primarily because the directions lead to a slightly different location on where things are.


For my Apple programming education, could someone please describe exactly the correct way to delete DerivedData and Simulator data? When I say "exactly", I'm looking for something like press Option, then in Finder press Go > Library ... and so on. The directory structure I'm seeing and the directory structure in the sparse directions I've seen DO NOT MATCH and I don't want to make a bad mistake.


I will then attempt the build again (after proper Cleans).


Thank you for relaying the correct procedure for Cleaning DerivedData and Simulator data (for both macOS and iOS projects).

Xcode 8.3.3 and 9.0b5 Runtime crashes in Simulators
 
 
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