iOS, watchOS and tvOS Simulators are great ways to test your apps without using an actual device. Here we will talk about working with Simulators.
There is no simulator for macOS, because Xcode is run on macOS and whenever needed, it will run the apps native.
You could always visit Simulator help at Help -> Simulator help:
You should go to Xcode -> Open Developer Tool:
Using "Simulator", you could run iOS and tvOS, but "Simulator (Watch)" will only run watchOS.
Go to Hardware -> Touch Pressure:
To simulate a normal press, use Shift-Command-1 and a deep one, Shift-Command-2.
If your MacBook has a Force Touch trackpad, you could use your trackpad force to simulate 3D / Force Touch.
Go to Hardware -> Device:
You should use Shift-Command-H to have an animation when closing an app.
To lock the device, use Command-L.
Use Command with arrow keys.