Jonathan Gitlin has published a lengthy review of Prism 5 Mac in Ars Technica.

His conclusion: "While there might be other stats programs and graphing apps out there, I don't know of any that are as user-friendly nor as powerful."

Prism 5 for mac has been released. You can read about Prism, download the demo, and order an upgrade (or new copy) at graphpad.com.