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kOSMetaClassNoInit
kOSMetaClassNoInit represents a broken OSMetaClass registration sequence: XNU logs that preModLoad() was not called before a class constructor attempted registration. Metaclass constructors are expected to run between the preparation and completion phases that establish the staging context for a kext's classes.
The current XNU source marks this status as “never returned” and logs the failure at the call site. That makes it mainly useful when reading legacy kernel logs or code derived from older XNU trees; it is not a normal application-visible device result.
Relevant boundary
- Check the loader path that invokes OSMetaClass setup before static C++ constructors run.
- Review constructor order and registration hooks for the affected kext build.
- Use surrounding OSMetaClass and OSKext logs to identify the class name and loading phase.
- Do not diagnose it as a hardware I/O error or an ordinary user-space allocation failure.
References
- Apple XNU: OSReturn.h
- Apple XNU: OSMetaClass.cpp
- Apple: deprecated kernel extensions and alternatives
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