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How a USB device gets driven on macOS
From plug-in to working app — IOUSBHost enumeration, IOKit matching, the DriverKit dext load, the user-space SDK. A complete trace of one device's journey through the stack.
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DriverKit: how Apple is moving every driver out of the kernel
Same IOKit object model, userland process. Why kexts are dying, what DriverKit gives you, and how a USB driver actually crosses the boundary.
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