Question regarding playing ps3 games on imac

Hi guys. I have been a guest here for some time and can not find my current problem being fixed.
I have a ps3 that I want connected to my imac monitor.
I bought a HDMI and mini DVI adapter and it connects from my ps3 to Imac. My question is where do i go on my imac to see the display? Im lost and obviously new to this so please help guys.

cheeap wii games
cheap ps3 games
buy wii games

Is it the 27 inch model? Only the newer 27 inch models have the mini display port which can let you use the screen for video input. You’re stuck to 1280x720p though.