It could be a bug or incompatibility, but there are some other subtle problems in your project(s) that may be affecting you.Incidentally, there is no such thing as a static framework. A framework is a dynamic library packaged as a bundle. Perhaps you mean a private framework (a framework embedded in an app bundle, so not shared between apps, which is very common), or a static library (which is a collection of object files, a library in the Unix sense, not in the Apple sense).— One possibility is that the deployment target got changed when you converted the framework project for Xcode 9. This might result in an incompatible build product.— Another possibility is that your are not producing the framework using Archive (from the Product menu), but are trying to use the build product from a Build or Run operation. The difference is that Build might not build all of the CPU architectures that a finished (Archive'd) framework needs — the variant for arm64 might actually be missing
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Developer Tools & Services
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General
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