Xcode 26.4+ fail to start WDA for older iOS versions such as iOS 15

[larryfirs]

I used Xcode to open the project, modified the Signing & Capabilities under lib and runner, enabled Automatically Manage Signing, selected a team, and changed the bundle identifier to a unique one. However, when I clicked Product > Test to run the tests, it showed "Test Succeeded", but an error appeared:
Cannot test target “WebDriverAgentRunner” on “iphone11（15.5）”: Logic Testing Unavailable Logic Testing on iOS devices is not supported. You can run logic tests on the Simulator.

why? what shou i do? who can help me? Is there a more detailed deployment guide? I haven't found the specific deployment instructions.

[KazuCocoa]

What Xcode version did you use?
I haven't seen the error, but for example https://developer.apple.com/forums/thread/820586 reported it - whcih might be Xcode's issue

[KazuCocoa]

Hm, I have ios 15, and I see the same issue. It looks like newer Xcode (26.4?) introduced an issue for older iOS versions.

Perhaps you can build it with Xcode 26.3

[KazuCocoa]

After building a WDA app with Xcode 26.4 and installing it through non-xcode/xcodebuild, it was able to install it. Thus, it looks like Xcode 26.4 (or around) introduced some changes for old iOS versions such as 15. I don't have iOS 16 so I was not able to confirm with the version, but Xcode 26.4? or arund ones would make WDA installation fail because of the tool side reason (based on the observation)

[KazuCocoa]

I confirmed that at least Xcode 26.4 overrided MinimumOSVersion=15.8 in the XCTest related built module while our project config for WDA and the Lib was 13.0. Xcode 26.4 might forcefully bump min OS version info somehow (at least) over the project config.
Still not clear is my iOS 15 is 15.8, but got the same behavior for Xcode 26.4.

[update]
Xcode 26.3 had no issue on my local.

[larryfirs]

Hm, I have ios 15, and I see the same issue. It looks like newer Xcode (26.4?) introduced an issue for older iOS versions.

Perhaps you can build it with Xcode 26.3

Thank you, I am indeed using Xcode version 26.4.1. I appreciate your help, I will go try it now.

[KazuCocoa]

Updated the title. Let me pin this issue and close this so users will be able to find out this in their web search

[KazuCocoa]

https://developer.apple.com/forums/thread/820586 addresses iOS 16, thus potentially iOS 16 will be also affected