I have a 2010 iMac and I have been flirting with the idea of adding a third display, but the driver issues have always put me off. Does anyone here use a newer USB to DP adapter like this with 10.8 without any issues? I know the performance won't be great, but as long as the cursor doesn't lag, I won't mind. Oh, I should add that I plan on using it with a 1920X1200 monitor if I do get it. I have considered other options such as Matrox adapters, but those aren't a viable options for me.