Diddlesom

I think if i could see the actual install screen i would be fine with the rest. It just goes blank when the install gets that far ? When is 10.10 offically relaease as a final ?

Thanks for all your help with this guys,think i will try a 10.8 install.

Each of those flags result in the same 'no input signal' on the monitor think i will have to give up on this one or go back to an older os

the only SATA options in the BIOS are: SATA On Off or RAID I did a BIOS update too to A06

Thanks infinity5750 Im going to give it a shot,i built a myhack 10.9 usb and booted with the flags: -v -x GraphicsEnabler=No and it ran right through to the install screen but monitor went blank and says 'No Input Signal' after around 5 minutes the PC shut down. Hardware specs are: GTX460 card 4GB DDR2 Q6600 CPU Unsure of the motherboard think its a Dell YU822

Dell XPS 720 10.9 install,is this possible ? I have been searching around and seen people installing Snow Leopard but nothing later i can find is there a simple reason for this ? I have installed on Q6600 systems before but i cant seem to get to the install screen on this machine. I see no option to set the SATA to ACHI mode so i have just left it on RAID,im thinking this may have something to do with it ? Any help regarding this issue would be great,i jusy cant see why it does not like the install. Thanks in advance