Macintosh PC emulator programs emulate the functionality of Windows and DOS. Obsession Off-Line will only run in a true MS-DOS environment. On the lowest levels, these emulation programs do not interact with the processor or memory components in your computer in exactly the same way as a true PC running MS-DOS does. We have tested some of these emulator programs and have not been able to successfully run Obsession Off-Line on a Macintosh. At this point in time, we cannot recommend attempting to run Obsession Off-Line on the Macintosh platform.