I was a windows user for a long time, too long in fact, but I finally made the switch to OSX and it's been great except for one thing... I missed Picasa. It's really a great photo management program and since iPhoto really wasn't meating my IPTC data expections I decided that I need to figure out how to get Picasa running on my MacBook. I googled "Picasa for OSX" and that gave me pretty much nothing except a bunch of links to posts about people, like me, wishing that Picasa would run on thier Mac. Google released a linux version of Picasa so there was hope that a version for OSX would soon be out but unfortunately as of the date of this post Picasa is only for Windows and Linux machines.
I was using Picasa though Parallels Desktop for a while in combination with a mapped network drive in windows to my photo directories in OSX but the need to boot windows every time I wanted to look at some photos became really annoying. I then came across Crossover Mac from Codeweavers which lets your run some windows applications without the need to have windows. Sure enough I downloaded the software, installed Picasa and I was up it was up and running within minutes! Viola! I was so happy to have Picasa running natively in OSX, even Picasa's spiffy DirectX animations worked.
The only problem I have been having is getting Picasa to import the directories I'd like it to import; even though I ask it to monitor specific directories and import the photos from that directory and it's subdirectories it still took me about an hour to get all 3000+ of my photos in Picasa. A small price to pay for having this wonderful program on my computer.
Thanks to "Donut" for pointing out that if you used the Picasa 2 designed for windows 98 you will experience a new perfect photo editing experience with almost no bugs!
Hopefully Google will soon release Picasa Mac so that I don't have to use this work-around for very long.