I am going through the same process. I bought FW CS5 a couple of years ago for PC but have just got a new Mac and want to install Fireworks (in the UK).
From my brief research it looks like Adobe are phasing out Fireworks but there doesn't seem to be a decent replacement available. Annoying having spent the last 10 years using it!
Again, any help appreciated.
Change is difficult, especially when one has invested a lot of time and effort into learning a software package.
You are correct that Adobe is phasing out Fireworks: no development, updates, or active support since May 2013 (when Adobe officially announced that Fireworks would no longer be maintained) - almost two years now. Sad, but true.
Have you checked out Sketch yet? http://bohemiancoding.com/sketch/
Ex-FW users generally like it.
Thanks for that, I'll check out Sketch.