Well, now you know how to fix it.
For assistance with Audio you should post in the
Audio forum.
Read the 'sticky' guides first and be sure to comply with the Problem Reporting instructions or you will not get any help.
For your graphics :
BIOS - Disable Integrated graphics - Set PEG as Primary
Use a digital connection - DVI or HDMI - VGA is not supported.
Boot with nv_disable=1
May need to update
Clover
Install
web drivers
Update web drivers to ensure that you have the correct version.
Config.plist - Do not inject Intel or Nvidia graphics and no ig-platform-id
Config.plist -
Disable SIP completely - CsrActiveConfig 0x67
Edit config.plist - NvidiaWeb = true as per
Link
May need to emulate native NVRAM -
Problem 6 - Install EmuVariableUefi-64 and RC scripts or install AptioMemoryFix and OsxAptioFixv3
Remove nv_disable=1 from config.plist
May need to install
Lilu.kext ,
LiluFriend and
NvidiaGraphicsFixup.kext
Potential Problems :
HDMI 2.0 is not supported - Use HDMI 1.4 (or lower)
If your graphics card has more than one output of the type that you are using then try another one.
Black Screen with MacPro 6,1 or iMac 15 or iMac 17 System Definition