The security firm on their official blog stated, "Most users won't understand what this means, and click on 'Continue' to allow the installation to continue."
Those Mac systems which are powered by earlier OS X versions, for example Snow Leopard, are mostly in danger of this attack as Java comes in the installation package itself. Intego has suggested that Macs running on OS X 10.6 must update their Java immediately.
However, at the same time the firm also mentioned, "Nevertheless, many Macs are getting infected by the social engineering trick of the bogus certificate purporting to be signed by Apple."