Xcode's iOS Simulator for Local Testing
A really nice feature available in Xcode is the iOS Simulator. Testing local sites is as easy as opening Safari and typing
localhost:9000 into the address bar.
Once Xcode is installed and up-to-date you can access Simulator by doing a Spotlight Search (Cmd+Space) for "Simulator" or if you're in Xcode it's under Xcode > Open Developer Tool > Simulator in the menu bar.