Prior to the turn of the century, it was generally considered an outright nuisance sharing files between Macintosh systems and well everything else. Apple provided Apple File Exchange and later PC Exchange in the early 1990s, system utilities that allowed PC-formatted floppy disks to be used initially with System 7.0. Whilst having the annoying habit of creating hidden files, it was good enough for moving around Office documents and JPEG images between platforms.
Users of DOS, Windows, and OS/2 were left neglected in the ability to read Macintosh-formatted disks, and consequently if you were frequently moving across files between platforms it was best to leave them formatted for PC. If you were determined to read Macintosh disks directly on your PC, you were left with no choice but to purchase a third-party utility. Whilst not the only option, this is where MacOpener comes into play.