Create an alias to iOS Simulator...
From the Finder, press Command+Shift+G and paste in the following:
Select “iOS Simulator.app” and either drag it into the Dock, Launchpad, or hit Command+L to create an alias
You can also install older versions of the IOS Simulator by launching Xcode, then go to Preferences, Downloads tab, and install the desired IOS Simulator version (e.g., 6.0, 5.1, 5.0.).