Here’s a quick-and-dirty utility I whipped up called DiskCopy2Dsk. A few people asked how to create raw .dsk floppy images to use with Floppy Emu. The hardware supports both DiskCopy 4.2 and raw .dsk image files, but DiskCopy 4.2 images are treated as read-only, so .dsk images are preferred. However, many emulation sites have their entire collection in DiskCopy 4.2 format.
On a vintage Mac, DiskDup+ will create .dsk images, or convert between DiskCopy 4.2 and .dsk images.
For 21st century computers, this DiskCopy2Dsk utility will bulk-convert DiskCopy 4.2 image files into .dsk format. It received at least 45 seconds of testing, so I’m sure it’s good. Source code is included for the curious.