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kOSKextReturnInternalError
A library failure, not a diagnosis of the bundle
kOSKextReturnInternalError is the OSKext library’s own catch-all internal status. XNU explicitly distinguishes it from the separate generic kOSReturnError. It therefore does not identify a malformed bundle, a signing failure, an unavailable dependency, or a policy decision by itself.
When this code is the only recorded result, the useful evidence is the operation that was underway and the first diagnostic emitted before the final status. Treating it as a bundle defect can send investigation toward the wrong stage.
What to preserve
- The exact API or tool invocation, target bundle identifier, bundle path, and macOS version.
- The complete diagnostic stream before the final return code, including any earlier status in the kext-return family.
- Whether the operation was inspection, dependency resolution, cache or collection processing, load, unload, start, or stop.
- Whether the same bundle reaches a more specific result on a controlled retry; do not replace logs with a generic summary.
For a modern deployment, also separate a legacy library failure from an AuxKC or policy stage. On macOS 11 and later, third-party kexts are handled through the Auxiliary Kernel Collection rather than being loaded into the kernel on demand.
References
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