So,struggling now with this,dont know if it is a faulty apple adapter, shittily designed apple adapter or just a apple feature. MP 1.1 + 4870 = 30"ACD in dualdvi port and 20"ACD via MDP->DVI connector. No picture in osx or XP. Display just not detected. So,is the adapter broken (its new,so unpropable?), is the adapter a normal apple desing and doesnt work (more propable) or is it that the MDP is borked in MP 1.1 by apple (very propable) ? Just checking out if I should return the adapter and get a thirdparty one or just forget it..