Question 131133 in Xcode Question posted in
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xcodebuild gives an error for multiple implementation of AMSupportURLConnectionDelegate and AMSupportURLSession : "Which one is undefined."

When I want to run any xcodebuild action it gives me the following error while the Xcode ide is working fine on Apple M1.

> xcodebuild -version
objc[72320]: Class AMSupportURLConnectionDelegate is implemented in both /usr/lib/libauthinstall.dylib (0x1dc35ab90) and /Library/Apple/System/Library/PrivateFrameworks/MobileDevice.framework/Versions/A/MobileDevice (0x105ca42c8). One of the two will be used. Which one is undefined.
objc[72320]: Class AMSupportURLSession is implemented in both /usr/lib/libauthinstall.dylib (0x1dc35abe0) and /Library/Apple/System/Library/PrivateFrameworks/MobileDevice.framework/Versions/A/MobileDevice (0x105ca4318). One of the two will be used. Which one is undefined.
Xcode 13.2.1
Build version 13C100

Both classes are implemented in /usr/lib/libauthinstall.dylib and also im another module, so I wanted check the /usr/lib/libauthinstall.dylib but it is not accessible

> open /usr/lib/libauthinstall.dylib
The file /usr/lib/libauthinstall.dylib does not exist.
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2

Answers


  1. 0

    I had the same issue again on M1. It seems the xcodebuild executable is Intel based. The error does not show if the xcodebuild process is started from a terminal running under Rosetta.

    My Xcode was installed from the App Store.

    Managed to fix it for terminal without Rosetta by removing Xcode and installing the 13.3 Xcode beta from: https://download.developer.apple.com/Developer_Tools/Xcode_13.3_beta/Xcode_13.3_beta.xip

    Now the xcodebuild executable is compiled for Apple silicon and the issue is gone.

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  2. 0

    I resolved by adding arm64 to the excluded architectures.

    Steps to resolve:

    1. Click your target
    2. Click Build Settings tab
    3. Make sure "all" tab is selected
    4. Expand debug / release / other stages under "Excluded Architectures"
    5. Add "arm64" next to "Any iOS Simulator SDK

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