I also have to mention that under Windows 7 the 3 screens works ok. was using a Gigabyte Radeon HD 6850 temporary), I used DDU to uninstall the driver I had installed & deleted the AMD & Nvidia folders that was on the C. NOTE: The screen connected to DP is a DVI using active converter (DP->DVI), exactly the model recommended on this thread. Of course, the second DVI doesn't work, but It happened also before. The package provides the installation files for AMD Radeon HD 6850 Series (Graphics Adapter WDDM1.1, Graphics Adapter WDDM1.3) Graphics Driver version 14.501.1003.0 In order to manually update your driver, follow the steps below (the next steps): 1.
I've just modify the file just as you told, and now HDMI screen works, but now the one connected to DP doesn't!! And it's not that it's recognized but shows 'No signal' as happened before with the HDMI, now it's simply that the screen connected to the DP is not recognized. Even If I connect only the HDMI the problem is the same.
My problem was just this, the HDMI screen is detected and seems to be ok but signal doesn't appears (No signal).
I've just build a machine with a 6850 that has 2 DVI+1HDMI+1DP, and 3 screens attached (1xHDMI, 1xDVI, 1xDP) (one of the DVI is unused, but in windows 7 I were unable to use 2 DVIs simultaneously, so I assume that in OSX is the same) Building a CustoMac Hackintosh: Buyer's Guide All Gigabyte Radeon HD 6850 Graphics Cards Drivers Free Download for windows 10, 7, windows xp, vista, 8 64bit & 32bit, update Gigabyte Radeon HD 6850 Graphics Cards Drivers free, just free.