You can connect an Apple Dot Matrix printer to a Macintosh SE with a
parallel-to-serial/serial-to-parallel converter.
Orange Micro makes a cable specifically for connecting parallel devices
into serial ports, whether those ports are on an Apple IIGS, Apple IIc, or
a Macintosh. It's called "Grappler C/MAC/GS", and it has a converter built
into the cable; it emulates an ImageWriter II and only requires using the
ImageWriter driver from a Macintosh.
Problems should be minimal in this connection as long as ImageWriter II-
specific features are avoided. Using an early version of the ImageWriter
driver (2.3 or before) may even be a workaround for that, since those
versions of the driver do not have any ImageWriter II-specific
functionality.
For more information, search under "Orange Micro".