Download Eclipse Juno:
http://www.eclipse.org/downloads/download.php?file=/technology/epp/downloads/release/juno/SR1/eclipse-java-juno-SR1-macosx-cocoa-x86_64.tar.gz

after install run this update.
http://download.eclipse.org/eclipse/updates/junoSR1Patch-tmp

Download Subclipse:
http://marketplace.eclipse.org/content/subclipse#.UN3Ta4njl6o

Install TestNG
http://beust.com/eclipse