Howto launch the iPhone simulator independently, without “Build and run”
Sometimes you don’t need to start Xcode, so it’s useful to start it independently.
- right-click the Finder in the Dock
choose "Go to Folder..."
use the follosing path: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/Applications/
launch the iPhone Simulator.app you find there