Apple has confirmed this issue may occur if a manual insert floppy drive is used to create the disks. Many recently-produced Macintosh computers ship with manual insert floppy drives.
Apple recommends using an older Macintosh computer with an auto insert drive to create the disks.
Workaround:
If a Macintosh computer with an auto insert floppy drive is not available, contact a local Apple-authorized service provider. Local libraries or Macintosh user groups may also have access to older Macintosh computers.
How to distinguish manual insert floppy drives from auto insert floppy drives:
- Auto insert drives will "grab" a floppy disk when partially inserted; a manual insert drive requires one to push a floppy disk fully in to the drive.
- Manual insert drives will have an egg-shaped indentation in the bezel in front of the drive to allow the disk to be fully inserted
- Manual insert drives may have a small "door" covering the opening of the drive when not in use.