These ROM files are quite annoying to get, you can extract one from a working Mac, or get one for vMac here (archived), or several one with You'll have to find a Mac computer ROM to emulate a Mac computer. Making Mac games work is quite complicated compared to DOS games. Many old games will work fine in a SheepShaver or Basilisk II, you should only install and configure one emulator first and to run the game in it.
You will need one of these softwares to play them: Macintosh emulation is quite hard to achieve, you'll have to try and fail a lot, and do a lot of research.Ībout 1000 Mac games are available on MyAbandonware, from 1980 to 2005.