Here’s my review of the version of Google Picasa that was released for the Mac platform on January 5th, 2009.
I had Picasa scan only my media folder that I created on my MacBook Pro, not the default Pictures and iPhoto folders. Picasa takes a while to perform the scan.
My Nikon D90 RAW files aren’t rendered very well in Picasa. The color and exposure is all wrong. Here’s what D90 NEF thumbnails look like in Picasa, vs. in Nikon ViewNX.
I notice the same effect when viewing JPEG images in Picasa vs Preview. The following is a screen capture of a Nikon D3X image showing how much more muted colors are in Picasa compared to Preview (click to view a larger version).
Again, I’m not sure why images seem to have less color and appear muddier in Picasa.