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Catalina in ga p67a ud4 b3 opencore

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Hi, im trying to install catalina in my old computer, but its not posible somehow.


Device lists:

MotherBoard Ga p67a ud4 b3 (legacy)
CPU Intel i5 3340
RAM 16 gb g-skill 1600mhz
Video Card MSI GTX 760 2gbDDR5
Sound Card (MotherBoard)
Network Interface Card Realtek 8111
Hard Disk kingston 256 SSD


Well, first of all, this is not my first opencore, already did some success opencore in laptop and another desktops, using opencore 0.6. I already know that ivy bridge + mobo 6 series is a little bit tricky, but the diference is just u need legacy boot and IMEI( i took the default one from opencore).

it boots cool into bootloader, and loads perfectly verbose mode, but when he is loading installer ( grey window with grey apple logo ), it stucks at 90%. When reboot, bios gives me CMOS checksum error, saying inside setup that the system experienced boot failures because of overclocking or changes of voltajes, and it load the last good config. 

Can anyone help me?








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