Hi, this a Commodore 64 game so you will need a C64 emulator to run it on a mac. I recommend the VICE emulator which you can download for free here:- http://vice-emu.sourceforge.net/macosx.html
Hi Steve. The disk version will automatically load and run the end sequence when you complete the game. For the tape version it needs to be loaded separately. I just noticed the end sequence tape file was missing from the download bundle so I have updated the download with the missing file. If you download the bundle again you will find the file in the tape folder.