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Every time booting high sierra, the opital drive(dvd writer) always get eject by itself. How to fix it, thanks.

It works for me also, thanks. Before I just stuck at making a usb stick!!!

In my case both methods cannot work in my destop h77 board, alc892.

after 10.8.2 update so many app cannot be opened (e.g. mail, calendar) system shown " XXX cannot be opened because of a problem" anyone like that? NOW is FINE!!! I use download 10.8.2 COMBO update.dmg from official apple, don't use self solfware update

YEAH!!! thanks toledo, your HD4000_AMI_EFI_hdmi_audio_dsdt_editing_kit script is very amazing!!! I just remove the old dsdt.aml to start ML again, and use DSDT editor extract the dsdt, then open the above patch script \ apply. In IASL\compile moment, that have many errors, I just press fix...

thanks toleda you mean I need to follow HD4000_AMI_EFI_hdmi_audio_dsdt_editing_kit GUIDE to create my own dsdt. One more Question: Should I need to modify appleHDA.kext later?

some body can help me to checking about my DSDT file, because after modified the dsdt file, and install MultiBeast - Mountain Lion 5.1.3 / driver / audio / alc898 (with dsdt) my MSI z77 can only have sound on speaker, optical port, even mic are working fine only HDMI cannot be choose...