Podcasts go bust

So much for camtasia.
I am going to try it again with the older version and see if that works. With what I did, I get a message taht I don't have a recent enough version of Flash and I should install it. SO I click accordingly, and download a zip drive... only the Mac doesn't kow how to open it. It's supposed to, of course, and the "directions" say to click on the icon that "will" appear.
So, dead end.
It's a mac thing - if you don't already know how to do it, you're out of luck.