Unfortunately only the newer intel Mac computers can run LW 5 because it requires Java 1.6. See http://www.gnutellaforums.com/mac-os...0-5-later.html about how to downgrade back to LW 4. You will need to remove the LW receipt file before the system will allow you to reinstall LW 4.

Thank you for the error messages images, that made it all so clear.