Xcode 26 failed in the real-device debugging process

Question

ZQ_Han OP

Created 13h

Replies 1

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Participants 1

Development environment:

MacBook pro

Apple M1

macOS Tahoe 26.2 (25C56)

Xcode 26.x

iPhone 6 Plus / iOS 12.4.4

Exception description:

After I upgraded to Xcode 26, my iPhone 6 Plus had a system version of 12.4.4. I was unable to perform real-device debugging, whether for existing projects or new ones. The error message from Xcode was as follows:

Could not launch “xxx”
Domain: IDEDebugSessionErrorDomain
Code: 3
Failure Reason: Cannot launch '/private/var/containers/Bundle/Application/A44062C1-32F5-4346-B13C-FC3F39EAF7A1/xxx.app': Unspecified

Even though I have already added device support for the iOS 12.4 <DeveloperDiskImage>

Has Xcode 26 stopped supporting the debugging of any devices running iOS 12 system?

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Answer 1

ZQ_Han OP

9h

Although the update log indicates that Xcode 26 has the lowest support level of iOS 15, historical versions can still enable device debugging by adding the corresponding platform's DeviceSupport (Developer Disk Image).

I haven't found any restrictions for iOS 12. If anyone knows the solution, please do let me know. Thank you very much for your assistance.

ZQ Han. Thanks!

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