Developer DeviceSupport 14.4.2 (18D70)

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Created Apr ’21

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When I attempt to run my project on an iPhone (Model: iPhone 7 (Model 1660, 1778, 1779, 1780) connected via USB, I get the following message:

Unable to copy symbols from this device. Xcode was unable to read the required data from the device.

Due to the limitations of this project;

I must use macOS High Sierra
I must use Xcode 10.1 to build the project.
I must use this iPhone model.

I need to get the appropriate DeviceSupport files that go into the device support directory.

Code Block /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport/

I have tried using the 14.4 files from Xcode 12.4 Build 12D4e and they did not work.
I have tried renaming the 14.4 directory to 14.4.2 and to 14.4.2 (18D70) and that also did not work.
I have tried all the available 14.4 options from https://github.com/iGhibli/iOS-DeviceSupport and they did not work.

This is my third attempt to get support on this and I am hoping that some kind soul will assist.

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Answer 1

DTS Engineer OP

Apple

Apr ’21

I must use macOS High Sierra
I must use Xcode 10.1 to build the project.

These product versions do not support developing with iOS 14 devices. To develop with iOS 14 devices, you must use Xcode 12, which requires a newer macOS version as well. Please see our Xcode version support document for the exact combination of product versions. The App Store will require Xcode 12 starting next week, so you need to plan on making this migration anyway.

Using any other method to enable Xcode to communicate with iOS devices it does not support is completely unsupported.

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