I have used the Floppy-EMU from BMOW and it was incredibly powerful I was able to emulate hardrives and floppies on both Apple II and Macintosh Plus that I own. Glad to see this guy is still making new products for the retrocomputing community!
1: write a disk tools disk using a greaseweazel 2: Boot the Plus and set up the partition etc 3: carve out just the partition to a disk image using dd 4: attach the resulting disk image to vMac, set everything up how I wanted it 5: copy the disk image back into its partition using dd