I was running my self-developed software on my iPhone 7 which runs iOS 12.2 when an alert had popped up:
This iPhone 7 (Model 1660, 1778, 1779, 1780) is running iOS 12.2 (16E5201e), which may not be supported by this version of Xcode.
The Xcode 12 release supports on-device debugging for iOS 9 and later, tvOS 9 and later, and watchOS 2 and later. Xcode 12 requires an Intel-based Mac running macOS Catalina 10.15.
If you try to use an iOS 15 device on Xcode 12.5, the device will be marked as unsupported and when running you'll get an error: The run destination is not valid for running the scheme. Xcode doesn't support iOS 15.
(Apple releases versions of the iOS SDK as part of the Xcode IDE.) If Xcode 12 is the first version of Xcode that supports iOS 14, you need to build with Xcode 12.
You could follow these steps:
And if you need any other "device support files for the iOS" you could download from here,
Thin unzip it,
Then go to your application folder,
Right-click on the Xcode-Beta.app and choose Show Package Contents,
Navigate to Contents->Developer->Platforms->iPhoneOS.platform->DeviceSupport,
Then paste the file you downlaod in it. Other resource.
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