This is a very rough and unofficial port of DOSBox 0.65 to Mac OS 9 and older.
It has only been tested on G4 computers with Mac OS 9.2.2. A fast G4 is needed for a "proper" gaming experience. A 350 MHz G4 can still run some games acceptably, but with compromises, such as no sound.
(Why version 0.65 and not a more recent one? Because, although newer versions (including the latest 0.74-3) compile, keyboard input doesn't work there. If someone wants to take a look, be my guest.)