Try this
post.
I used MacPoker Pro a little to check it out. And while I have no experience with PokerTracker being a mac user, it seemed to be very good program, easy to use, and did exactly what they promised.
I have switched to playing almost exclusively SnGs, so I am waiting for their next version which will support tournaments. At that point I will likely buy the program.
Here is a direct link to the website...
http://www.openendsoftware.com/index.html