If  a buyer need to run it on an Intel Mac with newer OS X such High Sierra, an emulator such as the open source BasiLisk II with System 7.5.3 must be installed on the High Sierra first.

COMPATIBILITY:
a computer program may install and work flawlessly on one system but may not on another. This is due to mainly the running OS version, video card you have, or driver software, etc.   We would be happy to help and get the program running on your computer, but ultimately compatibility issues are the responsibility of the buyer.  We suggest you check the program’s system requirements to determine if your system is suitable particularly if you intend to buy and install the software released long before your computer OS version released date. Ultimately, we are not responsible for software compatibility problems or publisher's errors.