Undefined symbol

Question

Created Sep ’25

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Is anyone have this problem on xcode 26 ? Undefined symbol: _swift_FORCE_LOAD$_swiftCompatibility50 Undefined symbol: _swift_FORCE_LOAD$_swiftCompatibility51 Undefined symbol: _swift_FORCE_LOAD$_swiftCompatibility56 Undefined symbol: _swift_FORCE_LOAD$_swiftCompatibilityConcurrency Undefined symbol: _swift_FORCE_LOAD$_swiftCompatibilityDynamicReplacements

Answered by DTS Engineer in 859849022

Historically I’ve seen errors like this when different parts of your Mach-O image — so object (.o) files or static libraries (.a) — are build with different tools or different deployment targets. Make sure that:

You’ve rebuilt everything with Xcode 26.
Your deployment targets are consistent.

Share and Enjoy
—
Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"

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Answer 1

DTS Engineer OP

Apple

Sep ’25

Recommended

Historically I’ve seen errors like this when different parts of your Mach-O image — so object (.o) files or static libraries (.a) — are build with different tools or different deployment targets. Make sure that:

You’ve rebuilt everything with Xcode 26.
Your deployment targets are consistent.

Share and Enjoy
—
Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"

1

Answer 2

Chikitai OP

5d

Type aliases are useful when you want to refer to an existing type by a name that’s contextually more appropriate, such as when working with data of a specific size from an external source

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