Originally posted by: MyMedia59 Here is a link to a later version driver but the 4850 is legacy anyway
That one probably won't work. Macs have OEM hardware and only work with OEM drivers. Knowing Apple probably the last OEM driver for the card is indeed from 2011...
CPU: AMD Phenom II X4 810 @ 3120MHz | RAM: Kingmax 2x2GB DDR2 800 @ 833MHz| MoBo: MSI K9A2 CF v1.0 (BIOS: 1.D)| GPU: Asus HD 6850 1024MB (DirectCu) @ 835/1135MHz | Display: L24FHD | PSU: PC Power & Cooling Silencer 750 Quad | OS: MS Windows 3.11 Pro x64