This version of Eclipse for Cocoa requires Mac OS X 10.5 (Leopard) or higher, and Java 1.4.2 to Java 1.5.x. Mac OS X 10.4 (Tiger) users can use the Carbon implementation of Eclipse instead. 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 5 (or greater) must be used.