What type of dvi adapter do you need to connect the samsung 226BW monitor to the iMac?

To connect a Samsung 226BW monitor to an iMac, you'll need a DVI to Mini DisplayPort adapter if your iMac has a Mini DisplayPort output. Alternatively, if the iMac has Thunderbolt, a Thunderbolt to DVI adapter would also work. Ensure that the monitor's DVI input is compatible with the adapter you choose.