none of us have floppy drives on our macs
...well, not exactly...
To copy floppy on a Mac is exactly equal to copy any other storage media (CD-ROM, DVD ROM, USB or Firewire Storage). There is several ways to do it. The easy one is drag and drop the flopy icon to a Hard Disk icon and later do the inverse process to restore the copy.
If you prefer to use Apple Disk Copy, simply drag and drop the floppy icon to the Disk Copy app icon.
... or insert the floppy with Disk Copy app open,
... or drag and drop the floppy icon to the Disk Copy app window
... or...