Apple Insider posted a story that the latest beta of Mac OS X 10.7.3 includes support for AMD's "Tahiti" graphics cards

AppleInsider first reported in October that Apple has internally developed a revision to the Mac Pro, but it remains undecided whether the updated desktop will see the light of day. People famliar with the matter said management, as far back as this May, were in limbo over whether to put any additional resources toward the product line.

Internal discussions at Apple were said to focus on the fact that sales of the high-end Mac Pro workstations have dropped off so considerably that the desktop machines are no longer particularly profitable for the company.

  Mac OS X 10.7.3 beta supports AMD's next-gen desktop graphics