Can you identify this iMac displayport and adapter?

[amateurhr]

I'm trying to allow my iMac to dual screen to a monitor with DVI input. I'm having trouble identifying what port on my iMac is necessary. I thought it was "displayport" but I ended up buying the wrong adapter:

http://www.amazon.com/StarTech-DP2DVI2-Display-Adapter-Converter/dp/B0035PS57C/ref=pd_cp_e_0

I believe I have a 2008 iMac (or perhaps 2007 refurb) and the port is more squarish than the adapter I bought. Here is a picture of the port: http://cl.ly/FcaA

Can anyone tell me the name of this port and/or a link to a good Displayport to DVI adapter?

 

[simsaladimbamba]

You need a Mini DVI to DVI adapter:

Mini DVI

Mini DVI is a digital common interface on the later G4 12" PowerBook, on Intel iMacs till 2009 and on the white and black pre-Unibody MacBooks and on Intel Mac minis before they changed the design to Unibody.

Mini DVI adapters can be bought online from:

Mini DVI to VGA adapter from Apple
Mini DVI to Video (Composite and S-Video) adapter from Apple
Mini DVI to DVI adapter from Apple

Mini DVI to VGA adapter from Monoprice
Mini DVI to HDMI adapter from Monoprice
Mini DVI to DVI adapter from Monoprice
​

Also of interest: "Mini DVI, what it is and how to capture it"
​

Most common video interfaces on external computer displays and TVs

Common video interfaces on Macs and the appropriate adapters to connect to other display devices

Most common audio interfaces on external computer displays, TVs and the Mac​

 

[amateurhr]

Thank you!