Using Xcode 26, the built package encounters device compatibility issues — while it installs successfully on supported iPhone devices, but it crashes immediately upon launch and cannot run normally.In previous versions of Xcode, the same "minimum deployment" setting in the project did not cause such compatibility issues.
The app built with Xcode 26 shows the following behavior when installed and tested on various devices:
- iPhone6p iOS12.5.8 fails to run
2.iPhone6 iOS11 fails to run
3.Iphone6 iOS12.5.7 fails to run
4.iPhone7 iOS12.1.3 ok
5.iPhoneX iOS 12.2 ok
6.iphone6s plus iOS10.3.1 ok
7.iphoneXS. iOS 12.1.4 ok
8.iPhone11 iOS 13.6.1 ok
9.iPhone7. iOS 13.7 ok
We have tested and found that an iPhone 6s Plus running iOS 10.3.1 can normally run the app. We would like to know whether apps built with Xcode 26 are inherently incompatible with iPhone 6 and older devices. Has Xcode 26’s underlying build environment removed full support for the A8 chip, resulting in binary files containing instructions or memory models that older devices cannot parse?
Looking forward to your reply.
Thank you for the post. I recommend reviewing the Xcode system requirements for the target listed below.
Link to Xcode System Requirements
The device support section will provide you with the supported iOS versions. You can view all the versions of Xcode by expanding the “Other Xcode versions” tab.
Enables the download of the Xcode version tailored to the desired iOS platform, accessible directly from the developer’s website.
Albert Worldwide Developer Relations.
