One such site, 'Last Measure', contained embedded malware that opened up 'an endless cascade of pop-up windows displaying pornography or horrific medical pictures.' They also performed proof of concept demonstrations. These actions occasionally interrupted the normal operation of popular websites. In July 2004, two GNAA members submitted leaked screenshots of the upcoming operating system Mac OS X v10.4 to the popular Macintosh news website MacRumors, resulting in a post which read 'With WWDC just days away, the first Tiger information and screenshots appears to have been leaked. The screenshots provided reportedly come from this upcoming developer preview.' According to sources, Apple will reportedly provide developers with a Mac OS X 10.4 preview copy at WWDC on Monday. In June 2005, the GNAA announced that it had created a Mac OS X Tiger release for Intel x86 processors which caught media attention from various sources.