I recently acquired an Apple IIgs with two 3.5" floppy drives and no hard disk. I'm very seasoned with older Macs, but I have no experience within the Apple II world.
I search for a way to create floppies to be used with that machine with help of an an older Mac: Both machines use the 800k GCR format.
The Apple II Documentation Project has a number of Disk Images for download, most often in .po format. (I learned that the other format, .2mg is used with Emulators.) These usually have 819,200 Bytes. According to this source, this is a .hdv-image type:
.hdv- typically an image 800k (819,200 bytes) or greater in size in ProDOS order. The image is intended for use as a virtual hard disk by various Apple II and IIgs emulators (e.g. Apple Oasis). The IIgs program ASIMOV2 can create .hdv files (select "Raw image"). The file name should end with ".hdv".
The bold emphasized text suggests that this is a binary image, about the same when reading a floppy disk in a PC with Linux with
dd and writing the output into a file.
I did even more research here, here, and here. Some of these sites more or less silently assume a hard disk on the IIgs, or even using an emulator. All in all, the described procedures seem to be very cumbersome.
Is there any easy way (like just changing the Macintosh file type code?) to write these .po images to 800k Floppy Disks with just DiskCopy on an older Mac?