i was just given a copy of myst 4 and i installed it on my macbook pro. however i cant figure out how to move, as i have no mouse on my laptop.

any advice or help would be great

Well, since you asked for any advice, here is mine: Buy a mouse and plug it into your laptop.

Presumably, you've tried your Trackpad and its button, and they don't work with Revelation. If that's the case (and you've done the appropriate OS and software updating), I agree with wstrohm - your only choice for playing the game is to buy a mouse!