Disabled Java plugin on Mac (new JAVA 7 Update 13 fixes this)
From the ArchiCADwiki: Breaking news – Disabled Java plugin on Mac Update 02/01/2013: Apple has recently blacklisted the Java Web plugin, as a result GRAPHISOFT’s key plug programming site (https://upgrade.graphisoft.com/) is not working on Mac systems. In some cases the site returns Java is outdated message, in other cases it just displays the standard error message, linking this site. With the latest OS X updates Apple has added a security