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To run an older iOS simulator, you must choose an older iOS version in the "iOS Deployment Target" build setting popup. Only then will the "Overview" popup offer older Simulators: back to 4.0 for iPhone and to 3.2 for iPad.
Specifying a device You can specify the device the simulator should run with the --simulator flag, followed by the device name as a string. The default is "iPhone 13" . If you wish to run your app on an iPhone SE (2nd generation), run npx react-native run-ios --simulator='iPhone SE (2nd generation)' .
According to the documentation should be able to choose which iOS version the simulator should run, however only the latest 4.3.2 is listed under "Hardware/Version".
The helps says: "To set the iOS release used in the simulation environment, choose Hardware > Version, and choose the version you want to test on."
I don't want to support 3.x (although it would be nice) but at least I want to simulate my app on 4.2, 4.1 and 4.0. What's going on? Why aren't they listed?
UPDATE: I'm on Lion so I cannot install an earlier version of Xcode. Before my Upgrade I could test different versions easily.
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