As stated in the title, my device is M4 macmini, running macOS 26, with Xcode version 26.1. The error message is "<private>: retrying debugserver without secure proxy due to error: Error Domain=com.apple.dtdevicekit Code=811 UserInfo={NSUnderlyingError=0xc42b07930 {Error Domain=com.apple.dt.MobileDeviceErrorDomain Code=-402653150 UserInfo={MobileDeviceErrorCode=<private>, com.apple.dtdevicekit.stacktrace=<private>, DVTRadarComponentKey=261622, NSLocalizedDescription=<private>}}, NSLocalizedRecoverySuggestion=Please check your connection to your device., DVTRadarComponentKey=261622, NSLocalizedDescription=<private>}, the official documentation does state that debugging is supported for devices running at least iOS 15. However, my 2019 MacBook Pro, with macOS 15.7.2 and Xcode 26.1 installed, can debug iOS 12 devices normally. The product manager has asked me to identify the issue, but I am at a loss. If anyone can provide a solution or confirm that support for iOS 12 is no longer available, we would be very grateful. Additionally, iOS 13 devices can all be debugged normally
iOS 15 is the minimum supported device for debugging. It sounds like you found at least one of the places where this is documented, the Xcode Support page, in addition to the Xcode 26 Release Notes. For anything older than iOS 15 where you found that you can still connect the debugger to your app with Xcode 26, please consider that a happy convenience for yourself at this time, but you also should not rely on it, and instead look at moving yourself up to the documented minimum supported configurations.
— Ed Ford, DTS Engineer
