> I cannot find on the official site the version for Mac OS X.
> reading on that site seems that Firebird is also avaible for Mac, but
> cannot find a link to download it.
> Any hints ?

At the moment, the development platforms for Firebird are Windows and Linux
so you will always see builds for these platforms for new releases. Other
platforms follow a relase as ports and can take time to become available.
I have (and a couple of other developers) have been working on the MacOS
builds for Firebird 2.0. We have a working build environment, but still
need to sort the installation details for the builds out...
So all I can ask for is patience. Unless of course you want to get involved
in the porting activity.

Paul