I have lost the initial BIOS version and flashed to the last one from the website in a first day, but it's buggy as hell. I have prepared a bug report and sent it to Zotac BIOS developers, and after a week they sent me this beta BIOS back. Plenty of bugs was solved, but not all of them, so I send another bug report and now I'm waiting for second beta BIOS, so it doesn't worth digging deep into this DSDT, because in 3 days it will be obsolete. I will eventually can for help after new BIOS be released, but now my OS X works fine with external graphic card.