Hi, Cocoa team! 👋
I maintain Sentry's Godot Engine SDK, and just started working on SentryObjC integration in here:

• WIP: feat(apple): Integrate SentryObjC framework and add metrics support sentry-godot#755

I found an issue where not all symbols are available in x86_64 slice in the shipped dynamic framework bundle in 9.16.1 and 9.17.0 releases.

The error surfaces upon linking:

Undefined symbols for architecture x86_64:
  "_OBJC_CLASS_$_SentryObjCAttributeContent", referenced from:
       in cocoa_metric.os
  "_OBJC_CLASS_$_SentryObjCMetricValue", referenced from:
       in cocoa_metric.os
  "_OBJC_CLASS_$_SentryObjCUnit", referenced from:
       in cocoa_metric.os

These types are affected (maybe more): SentryObjCAttributeContent, SentryObjCUnit, SentryObjCMetric, SentryObjCMetricValue.

I didn't have a chance to look why this happens yet - documenting the issue here for posterity.

Important detail: Our floor is macOS 10.14 on x86_64 which happens to be the Cocoa's floor as well.

Reproduction project

Super-minimal repro project: mrp-sentryobjc-x86_64-link.zip

• Xcode 26.0.1 (I don't think it will matter).
• Download, then run repro.sh (after inspecting its contents ofc 😉).