How do we install older iOS SDKs in Xcode?

Hi all. I'm writing an app that targets iOS 15 and beyond. I can't build or test because Xcode complains that iOS 17 SDK is not installed, which is true. But my deployment target is set for 15.6.

I installed a simulator for 15 by downloading iOS 15 simulator support from the Platforms tab in settings. This is also where you see that iOS SDKs there are... but there's no way to add them. The + button in the corner only lets you install more simulators.

Where do you install support for earlier iOS versions? This is in Xcode 15.0.1.

Thanks.

Was this issue resolved? How did you handle it?

So many older devices are sitting idle and would be ideal to test simple apps. Where is the @apple answer to this recurring question? Neither Gemini nor Grok have definitive answers on this. Maybe @apple should just say: "bring your old devices to an APPLE store and we will freely exchange them for newer ones that support the Xcode bundled SDKs"

How do we install older iOS SDKs in Xcode?
 
 
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