Mountain Lion on Intel DG41RQ with ATI Radeon HD 5450 Graphic Card

Hello to All,
I am newbie here want to install ML on my Intel Desktop Motherboard DG41RQ Processor= core 2 Quad 2.6Ghz, RAM=4GB, Graphic Card is ATI Radeon HD 5450. I am using USB created with Multibeast 5.2 things went wrong when I pluged the ATI Radeon HD 5450 Graphic Crad. It stuck on boot with teh message "Pci Configuration Begin" I've tried multiple switches e.g.. PCIRootUID=1,GraphicsEnabler=NO,YES, Boot Verbos Mode and Safe mode blah blah, if I remove the card and run the pc with builtin graphic which G41 Chipset and GMA 4500 it runs fine but there is no driver for this VGA( Atleast I could not Find on the net).

My BIOS configuration is Core Multiplex Tech = Enable, MAX CPUID Value Limit=Disable, Drive Configuration = Legacy Sata Only, PCI Latency Timer =32 ,HPET=Enable, UEFI=Enable XD Tech= Enable, Intel VT=Enable.

Please help me to install Mountain Lion on my Mobo with that ATI Radeon HD 5450 card.

Sorry if I missed any point needed to solve my problem, you can ask but Please help me I am curious to fix it up.

Thanks and Regards,

First try with DVI and not VGA. If you can't get it working with this see my post, I've my dell working with a ati 5350hd

I get the kext here

http://www.osx86.net/view/3043-ati_radeon_hd5450_with_full_qe-ci_suppor_...html

Thanks for your response! alespardo

my problem is that my system stuck while installation I've tried many switches but screen freeze at this point...

IOPIC:Version 0x20 Vectors 64:87
ACPI:System State [s0 s3 s4 s5] (S3)
PFM64 (36 cpu) 0xf10000000, 0xf0000000
[pci configuration begin]

I googled and found many tweaks one of them which change or add one line to above is ....

-v -x npci=0x2000 pci-off busratio=20

it add extra line "resolution 1024 x 768 @f00000" to above

NOTE: I can easily install Mountain Line after removing Graphic Card which is ATI Radeon HD5450 and thanks for sharing the driver(kext) link I've already found it on the net by google. so problem occure when I plug the Graphic card I don't know but there must be solution e.g..a switch or bios setting or tweak for it thats what I am asking and searching for.

Thanks

I think you have to install with the ATI plugged, follow this steps like me:

Special thanks to nhomen :

http://www.tonymacx86.com/mountain-...-success-dell-inspiron-580-mountain-lion.html

*Do a clean instal of ML.
*Boot via UniBeast with these boot flags " PCIRootUID=0 GraphicsEnabler=No -x -v "
*After ML installs, check Messages and Notes to make sure they run properly. A couple of times they would fail to load so I had to reinstall ML.
*If the apps work, place your ethernet and video card kexts on the desktop and run KextBeast

then do Nithy says:

http://www.osx86.net/view/3043-ati_radeon_hd5450_with_full_qe-ci_suppor_...html

No Luck!


I've decided to change the graphic card...lemme find one suit to my budget....

Thanks you again buddy...alespardo

the only way that i did to work this card, is to boot whit vga intel like primary video controller. having connected to outs (vga and dvi) in the same monitor and when the boot ends just change the monitor from vga t dvi that is all. and works perfecly with qe/ci full . try this