MacOS UE 5.7 Build Errors

[anonymous-edc (Anonymous User)]

MacOS UE 5.7 Build Errors… there’s already a Community forum post about it here, which describes the problem and a proposed solution

MacOS UE 5.7 Build Errors

Hello, I’m running into a compilation error when building Unreal Engine 5.7, and it appears to be an issue in engine code rather than project code. (Sonoma 14.6 / Xcode 15.4) PlatformProcess.h(75,12): Error : no matching constructor for initialization of ‘TTuple<FReadHandle, FWriteHandle>’ (Engine/Source/Runtime/Core/Public/HAL/PlatformProcess.h) return TTuple<FReadHandle, FWriteHandle>{ ReadPipe, WritePipe }; In UE 5.7, FReadHandle and FWriteHandle seem to have become strongly typed han…

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[anonymous-edc (Anonymous User)]

Steps to Reproduce
Compile PlatformProcess.h’s FPipe on Apple Silicon.

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[step_jac_eg]

Thank you for bring this issue to our attention. The workaround to a version of clang not implementing copy initialization properly in that context looks valid. We’ll look at this internally. Is there a particular reason for targetting versions of Xcode prior to 16? Apple stopped allowing distributions of apps on their ecosystem with Xcode below 16 as of April 2025.

Best regards.

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[anonymous-edc (Anonymous User)]

We don’t ship apps ourselves, we develop a plugin for Unreal. Since Unreal 5.7 lists XCode 15 as supported, we’d ideally like to build and test our plugin on that configuration, in case our customers are using that configuration for some reason.

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[step_jac_eg]

Hi Andy,

We have integrated the suggestion at CL# 50358450.

Thanks for bringing this to our attention.

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