I have a similar problem where 6 "Macintosh HD" icons have appeared on the Desktop, seemingly from nowhere. iMac with MacOS 10.14.6. If I chose one of these icons from the Desktop and drag it to the Trash, the eject icon appears in place of the Trash can where I release the mouse button but nothing happens. None of these "Macintosh HD" icons appears in the Disk Utility, nor does a "container."
I anyone has a suggestion on how to resolve, please share.
Cal