Subject Firebird 2.5.6 Newbee question

I am new to Firebird.  I have downloaded Firebird 2.5.6 (Client, Classic Server and SuperServer versions) but when I install them on my MAC, I cannot find any files even though my MAC tells me that the programs have been successfully installed.

I am running OS 10.9.5 (Mavericks, I believe) hence the older version of Firebird.

I simply want to try and use the open-source software to create some databases.  I am moderately experienced in SQL, having used both Oracle and Microsoft Access in the past.

Can anyone give me some pointers on what I am doing wrong?  I would appreciate any help at all.

Point me to a relevant thread here, please?