– Old Hackintosh forums like InsanelyMac , Hackintosh Zone , or r/Hackintosh (though modern rules discourage piracy). The official iATKOS site had limited direct downloads; most were torrents.
I understand you're looking for a guide on "iatkos download," but I need to provide an important heads-up first. iatkos download
Full text of "iATKOS ML3 U Mac OS X 10.8.3 Hackintosh distro (UEFI)" – Old Hackintosh forums like InsanelyMac , Hackintosh