Thread: Issue booting OS X Mountain Lion with Radeon HD 6450

Hello guys, I have a problem, I installed successfully Lion on my computer with my new video card (Radeon HD 6450 2GB) and everything works correctly, then I tried to create a bootable USB with MyHack and when I try to boot from it the apple logo shows for some seconds, it appears to be loading and then after some time (1-2 mins) the screen disappear and the monitor says no signal, how can I solve this problem? I tried with Mountain Lion DP1-3-4 and GM but I am having the same problem, if I remove the video card I menage to install it. Please help me, I really want iMessage and all the news introduced in Mountain Lion on my PC.

If you install ML GM with Myhack then replace in S/L/E ATI kexts from mountain lion DP3:
ATI6000Controller;
ATISupport;
ATIRadeonX3000;
ATIFramebuffer;

Install with kext Wizard, before reboot run MyFix on MyHack.
Reboot and install ML GM.
After installation boot your LION system and new run MyFix else system "still waiting for root device".

Thanks for the quick reply but I have to say that I'm pretty new on this so I didn't understand what to do at all XD
Can u please tell me what to do more specifically?

Goto in System/Library/Extensions of ML DP3 and copy the kexts on your desktop.
Download and install on your LION hackintosh Kext Wizard.
Run Kext Wizard and tap on installation;
Drag and drop the kext one at once into window Kext Wizard and install into partition installation ML GM and select System/Library/Extensions.
Run MyHack e select run MyFix and select partition ML GM installation.
When finishing do no boot ML GM but LION and new run Myhack MyFix and select ML GM partition.
When MyFix ask Full or Quily select Full.

Originally Posted by macosx1073

Drag the kext one at once into Kext Wizard and install into partition installation ML GM and select System/Library/Extensions.

What do you mean by "partition installation ML GM"? Do you mean the partition I created with myHack?

of course, is that the installation partition.

I did everything you told me to do, I tried again to boot from ML GM but nothing... again the same problem, no signal on the screen....

Any other tip to help me installing ML GM on my pc? Please I really need it

Hello Carlo, you're Italian? very strange .... Did not you say a few things: you managed to install ML GM?

Yes I'm italian, I said that I did install ML GM before installing the new video card on my computer, not that I have it installed I'm having this issue.