Apple has also stopped releasing security updates. McAfee, our antivirus vendor, has announced that they will cease releasing updates for these platforms. ITS will end support for PowerPC Macintoshes and Mac OS 10.4.x and 10.5.x on December 31, 2013. End of support for Power Macs and Mac OS 10.4, 10.5 SUMMARY:Įnd of support for Power Macs and Mac OS 10.4, 10.5