web training using Macs

I worked in print publishing for several years, but have been out of that career for about 5 years. I want to re-enter a career working in a mac based environment. I completed two non-credit html courses to look at web basics.
I've been thinking about Dreamweaver & Flash training as well as CIW certifications.

I purchased the CIW foundations training from www.ciwcertified.com, because they said it would run on a mac, but that simply isn't true.

Is there a source that can provide a recognized & accepted training method that can be done on a mac making me desirable as an entry level hire in the web world?

On another note. What about apple certifications? What kinds of opportunities would those certifications provide?

Thanks