Mac computers in USB Target Disk Mode via USB-C appear as "unknown" in Windows

If you're using Boot Camp to run Windows on a Mac computer and you connect a second Mac in USB Target Disk Mode via USB-C, the connected Mac will appear as "unknown" in Windows.

Connecting a Mac in USB Target Disk Mode to a Windows host via USB-C is not supported. The connected Mac will appear as "unknown" in Windows.

The connected Mac will also unmount and attempt to re-mount every minute or so. Disconnect the Mac that's in Target Disk Mode to keep it from attempting to re-mount.

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