I cant find where the dvd drive is on my mac. Does anyone knows?

If that iMac model is actually running Mac OS 9, it’ll be a slot or tray at the front.

For many newer iMacs, it’s at the right edge of the case. Recent models don’t have one.

(129739)

If your model doesn't have one I suggest you either visit your nearest Apple store or go online and purchase the new USB Super Drive.

Good Luck and Cheers

Don Morgan