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I have the same problem (except my motherboard is an Asus P8Z77-V). Have you found a way to make it work ?

My specs : - Asus P8Z77-V - i7 3770k - Sapphire HD7970 Ghz Edition Vapor-X 6GB I can't get my 7970 to work ! I tried to do the trick with the HD4000 but the screen stays black. What's the problem ?

I can't get my Sapphire HD7970 Ghz Edition Vapor-X 6GB to work. My motherboard is an ASUS P8Z77-V. The HD4000 is set as the primary graphics but when I start Mac OS X with the HDMI plugged in the HD7970 nothing happens... I have waited enough time but the screen stays black. What's wrong ?

I finally found what was the problem. It was the USB connection of my Corsair H100i.

It didn't help. It takes less time to go into sleep mode but it wakes up. I just noticed that it's a sleep -> wake loop. It sleeps (fans off, blinking sleep light) then wakes up and it starts over and over.

I had a filter : wake reason. Here is one with everything when I put my Hackintosh to sleep :

My Asus P8Z77-V uses a flashed BIOS (can't remember where I downloaded it) and I'm not using any DSDT or SSDT (DSDT-Free Install).

That's what it says :

The wake reason is "?", so what's the problem ? And I haven't installed USB 3.0 drivers.

Should I reinstall Mountain Lion ?

Are you sure ? Are you using a DSDT ?

Yes, I did reboot after each change. It seems that I have none of these kexts in /Macintosh HD/System/Library/Extensions. By the way. my motherboard is an Asus P8Z77-V and I'm using a flashed BIOS.

I tried to change it to ...=1 but it didn't work so I erased the Darkwake line and my boot logo changed but nothing else, still doesn't work.

Here it is :

Rebooted and tried, didn't work. It goes to sleep and then wakes.

Will it work with Chimera ?

Thanks for the quick answer. The "Wake for ethernet network access" in Energy Saver preferences box is already unchecked. And what do you mean by enabling "the C2, C3, and C4 sleep state in the boot.plist." ?

Hi, I just installed 10.8.3 on my PC, everything is working fine except that when I put my computer to sleep it wakes up two seconds later without any reason. (Console log -> Wake reason : ?) Don't know what's wrong...

It worked with GraphicsEnabler=No, everything went find and I've found some problems. First, when I try to put my computer in sleep mode, the screen goes white so sleep doesn't work (my BIOS has been flashed, so sleep should work, no ?). Then, my HD4000 isn't detected as a HD4000 and the only...

But aren't there any negative effects ? Is there a way to make my HD 4000 work with Mac OS X ?