Canon 5D Mark III Raw Files Not Viewable in Finder for Snow Leopard 10.6.8

System specs:

Computer: Mid 2008 Mac Pro - Dual Quad Core

OS: OS X 10.6.8 (includes the most recent Digital Camera Raw Updates)

Camera: Canon 5D Mark III

Problem:

Finder can not preview the thumbnails from this camera. While not that big of a deal (I can use Lightroom, Bridge, etc to view these) it is a bit of an annoyance when transfering files around from one volume to another.

According to this Apple support page - http://support.apple.com/kb/HT3825?viewlocale=en_US&locale=en_US - I may need to update iPhoto, in order for the Digital Camera Raw Updates to work (specifically 3.12 from last year that addressd the 5D3's raw files).

As a pro photographer, I have ZERO use for iPhoto. But, I would be willing to spend the $15 for the newest version of iPhoto, if I knew that would solve the Finder thumbnail problem.

I would love a definitive answer, without having to call Apple and paying the "per-incident support fee."