Radnor is a Graphical User Interface (GUI) frontend for the open-source DOSBox Disk Operating System emulator. The emulator is bundled with Radnor.
DOSBox is typically run from the command line with a variety of options. Radnor simplifies and facilitates launching DOSBox.
With Radnor, it is easy to run your favorite old DOS games again, transparently, from Mac OS X. Radnor requires the SDL runtime libraries, available here.