HELP!!! apple logo with black text stuck

[Simpler]

Try -v -x -f nv_disable=1. What is your system's definition?

 

[Swelly]

I'm in a weird boat here with the same system specs as OP

Do you know what would be a recommended Multibeast config? My graphicscard is coming up as an unknown chipset and I'm pretty lost

 

[patelshyam99]

Hey, try disabling turbo boost in your bios. I tried that on the advice of another thread and I was able to install mountain lion (which had had the same problem as yosemite). I'm not ready to try again with yosemite but please let me know if this works!!!'

Thanks Works flawlessly Now

Update: i updated my smbios to imac 27in late 2013 and have reactivated turboboost and YAY NO PROBS!!!

 

[patelshyam99]

Hey try this install the nvidia web drivers with the 970 in the system but when it prompts you to restart, DO NOT RESTART YET! after you are in you must go in to the extras chameleon plist and make sure the following text is entered and if it is not add it in.


<key>Kernel Flags</key>
<string>kext-dev-mode=1 nvda_drv=1 GraphicsEnabler=No</string>


Hope this help as it worked for ME