Xcode 26 Beta 3 unable to build with error: Failed to find a DDI that can be used to enable DDI services on the device

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In Xcode 26 Beta 2 I had no issues, but as soon as I updated to Beta 3, I get the following error when I attempt to build to my iPhone 15 Pro running iOS 26 beta 3:

Failed to find a DDI that can be used to enable DDI services on the device. Usually this means the best DDI we could find for a platform did not have compatible CoreDevice content. Run 'devicectl list preferredDDI' from the command line to get more details on why no valid DDI can be found.
Domain: com.apple.dt.CoreDeviceError
Code: 12001

I ran xcrun devicectl list preferredDDI and get the following:

WARNING: No usable DDI found for the iOS platform (The DDI's CoreDevice content is too old.). Best (unusable) DDI found is:
• hostDDI: file:///Library/Developer/DeveloperDiskImages/iOS_DDI/
▿ ddiMetadata:
    • buildUpdate: 17A5241o
    • contentIsCompatible: false
    • coreDeviceVersionChecksIncludeDevelopmentRevision: true
    • developmentRevision: 0
    • enforcingCoreDeviceVersionChecks: true
    • platform: iOS
    ▿ projectMetadata:
        • Citrine-1070
        • CoreDevice-477.23
        • DTDeveloperDiskImageSupport-14.0.0
        • DTOCMock-23002
        • GPUToolsDevice_DDI-310.16.1
        • JetsamProperties-2624
        • LiveExecutionResultsLogger-20007
        • Mercury-64
        • Playgrounds-8
        • XCTest-24209.8
    • incompatibleContentReason: The DDI's CoreDevice content is too old.
    • isUsable: false
    • variant: external
WARNING: No DDI was found for the macOS platform.
         No usable DDI found for the tvOS platform (The DDI's CoreDevice content is too old.). Best (unusable) DDI found is:
• hostDDI: file:///Library/Developer/DeveloperDiskImages/tvOS_DDI/
▿ ddiMetadata:
    • buildUpdate: 17A5241o
    • contentIsCompatible: false
    • coreDeviceVersionChecksIncludeDevelopmentRevision: true
    • developmentRevision: 0
    • enforcingCoreDeviceVersionChecks: true
    • platform: tvOS
    ▿ projectMetadata:
        • Citrine-1070
        • CoreDevice-477.23
        • DTDeveloperDiskImageSupport-14.0.0
        • DTOCMock-23002
        • GPUToolsDevice_DDI-310.16.1
        • JetsamProperties-2624
        • LiveExecutionResultsLogger-20007
        • Mercury-64
        • Playgrounds-8
        • XCTest-24209.8
    • incompatibleContentReason: The DDI's CoreDevice content is too old.
    • isUsable: false
    • variant: external
WARNING: No usable DDI found for the watchOS platform (The DDI's CoreDevice content is too old.). Best (unusable) DDI found is:
• hostDDI: file:///Library/Developer/DeveloperDiskImages/watchOS_DDI/
▿ ddiMetadata:
    • buildUpdate: 17A5241o
    • contentIsCompatible: false
    • coreDeviceVersionChecksIncludeDevelopmentRevision: true
    • developmentRevision: 0
    • enforcingCoreDeviceVersionChecks: true
    • platform: watchOS
    ▿ projectMetadata:
        • Citrine-1070
        • CoreDevice-477.23
        • DTDeveloperDiskImageSupport-14.0.0
        • DTOCMock-23002
        • GPUToolsDevice_DDI-310.16.1
        • JetsamProperties-2624
        • LiveExecutionResultsLogger-20007
        • Mercury-64
        • Playgrounds-8
        • XCTest-24209.8
    • incompatibleContentReason: The DDI's CoreDevice content is too old.
    • isUsable: false
    • variant: external
WARNING: No usable DDI found for the visionOS platform (The DDI's CoreDevice content is too old.). Best (unusable) DDI found is:
• hostDDI: file:///Library/Developer/DeveloperDiskImages/xrOS_DDI/
▿ ddiMetadata:
    • buildUpdate: 17A5241o
    • contentIsCompatible: false
    • coreDeviceVersionChecksIncludeDevelopmentRevision: true
    • developmentRevision: 0
    • enforcingCoreDeviceVersionChecks: true
    • platform: xrOS
    ▿ projectMetadata:
        • Citrine-1070
        • CoreDevice-477.23
        • DTDeveloperDiskImageSupport-14.0.0
        • DTOCMock-23002
        • GPUToolsDevice_DDI-310.16.1
        • JetsamProperties-2624
        • LiveExecutionResultsLogger-20007
        • Mercury-64
        • Playgrounds-8
        • XCTest-24209.8
    • incompatibleContentReason: The DDI's CoreDevice content is too old.
    • isUsable: false
    • variant: external

When I run xcrun devicectl manage ddis update it hangs and does not update.

I have also tried the obvious steps of uninstalling and reinstalling as well as unpairing and repairing my run devices.

I have not tried sudo rm -rf /Library/Developer/DeveloperDiskImages/*

Is that step recommended? Or any insights how to solve this issue?

Thanks!

Answered by codingLawyer in 848967022

Just for anyone facing the same issue, I was able to finally get past this error with these steps:

(1) ran sudo rm -rf /Library/Developer/DeveloperDiskImages/*

(2) ran xcrun devicectl manage ddis update but it seemed to hang, so I restarted my Mac (terminated the process) then

(3) I then run xcrun devicectl list preferredDDI and it was empty so

(4) I ran xcrun devicectl manage ddis update and this time it successfully updated the disk images and was able to build to my IPhone again.

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codingLawyer OP

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