Use of undeclared identifier 'malloc_type_zone_malloc_with_options_backdeploy'

Developer Tools & Services Xcode
asfdadsfasdfasdfsasdafads OP
Created Sep ’25
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I'm attempting to compile my app (on macOS 26), opting into the "Enhanced Security" (Xcode Version 26.0.1 (17A400)).

Following Apple's documentation I enabled the capability via Xcode and clicked "Enable Build Settings" though now compilation fails:

Use of undeclared identifier 'malloc_type_zone_malloc_with_options_backdeploy'; did you mean 'malloc_type_zone_malloc_with_options'?

The (AI-based?) "Generate Fix for Issue" throws an error too 😅

See attached screenshots

Replies  1
Boosts  2
Views  183
Participants  2
Ross165 OP
Oct ’25

Same issue Claude AI seems convinced this is an XCode issue. None of the workarounds work besides disabling all the enhanced security checkboxes.

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Use of undeclared identifier 'malloc_type_zone_malloc_with_options_backdeploy'
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