Last I knew ActivStats and regular Data Desk worked on Macs. DDXL no longer works with Macs because it does not work with the two most recent versions of Excel for the Mac. This is an issue with reduced support for Macs from Microsoft more than a DDXL issue, but that doesn't help you much;-(
For something that is free and runs on PCs and Macs, look at Statcato. You would probably want to download it to your Mac for running demos live. It's a Java applet and the default is to run it from their server but it is incredibly show;-(
StatCrunch is quite cheap. It's similar to Statcato but a big step up for not much money.
Forwarded message: > From: "Lydia K. Eppic" <email@example.com> > > I'm a first-year Stats teacher with no previous experience with Statistics software. My question is about technology packages available for Macs. I have been unsuccessful in loading DDXL and ActivStats on my MacBook Pro. It looks like the operating system won't support these "old" software packages. My preference is to find "free" software, or even some handy online applets if it comes to that. Our school's computer lab has PCs, but I'd like to demonstrate how a program works in the classroom before heading off to the lab.