AMD Radeon HD 6970M

Please only download from the Mac App Store. Click updates and install any necessary updates.

Macs are not like MS Windows boxes that you need to hunt down drivers for. If any updates for the GPU for were released they would be available on the Mac App Store.

Try here:

Download Drivers

Dear Duchy, If you test the site you linked, you will find its Mac selections are largely limited to drivers for video cards used in pre-Intel Macs (those made prior to 2006) that cannot use the Mac App store for upgrades. Looks like the OS support for those drivers offered stops at OS 10.5 Leopard.

That link would be good to keep for answering questions in the PowerMac forums and possible the iMac PPC forums but bit forums for newer Macs.