Xcode 12 - No architectures to compile for (ONLY_ACTIVE_ARCH=YES, active arch=x86_64, VALID_ARCHS=arm64e armv7s arm64 arm7)

If you can't see "VALID_ARCHS" in BuildSettings. You can click the plus button.

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click "Add User-Defined Setting"

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Input setting name "VALID_ARCHS" , input value "arm64 arm64e armv7 armv7s x86_64"

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Theorectically it should be enough changing debug from yes to no.

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But as you said it did not work it must be that you have to set VALID_ARCHS to what you have plus x86_64.

Go to your App's target and select 64 bit standard architectures in Architectures section. See attached screenshot

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