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No display just sound after Mac OS 10.6.8 update


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Hello, when i try to boot in Mac it seems to stuck on white screen, however if i press ctrl+z i can hear beep sound,and if i hold F12 my dvd open. I am sure this is because graphics card - HD6850. With my Gts250 i can boot (no driver working though), but after I read Mac os support Radeon graphics natively i decided to put my HD6850. With 10.6.3 i have no problem with Radeon. Why is that? No Chameleon installed, i boot with Nawcom modcd and the following flags: -v cpus=4 maxmem=4096 busratio=29 PCIRootUID=1 npci=0x2000

 

My specs:

- AMD Phenom ii x4 925

-Asus 785 mobo

- ATI Radeon HD6850

- Mac OS 10.6.8

 

Many thanks to all of you. I will be very happy if you help me.

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Why you dont use your GTS 250? i use a GTS 250 too and i have all drivers installed, it works godlike even with 3 screens connected is all smooth and perfect

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I think the kexts i have are for Lion, i have Lion installed and they work there for me but they shoukd also work on 10.6.8...

Here i uploaded the kexts i used for you...

 

http://uploaded.to/file/jigr4jfe

 

Hope they work for you

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Mine shows evga GTS 250 too, thats normal with htis driver! but for me all is working great, i get 1920x1080 resolution and all effects work perfect... do u have the 512MB model oder the 1024MB model?

 

screenshot20120331at630.png

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