The RCP downloads are meant as a base for building Eclipse RCP applications.  
As such, they do not include an application of their own and simply running the 
RCP install will do nothing.

Eclipse 3.2 requires Mac OS X 10.4 (Tiger) or higher and Java 1.4.2 or higher.
Since M5 Eclipse supports the Intel architecture.

Please use BOMArchiveHelper if StuffIt fails to extract the downloaded tar.gz
(https://bugs.eclipse.org/bugs/show_bug.cgi?id=131650).

In order to use the SWT_AWT bridge, OS X jre version 1.5.0 Release 4
(or greater) must be used, and the additional "SWT Compatibility Libraries"
must be installed.  These libraries can be downloaded from the Downloads
section of Apple Developer Connection (http://connect.apple.com).  It's free
to create an account at Apple Developer Connection to access the download
(180K).  (Eclipse report: https://bugs.eclipse.org/bugs/show_bug.cgi?id=67384).