Apple logo and black background won't go away.

[jackassninja]

Hello,
In fact, my problem could be a matter of graphics issue.
I have a Quadro K4000 for which I'm aware that It is supported.
However, every time I boot, MAC OS turns on fine but It is the apple logo with the progress bar and the black background that doesn't go away. I know that I can still type and operate the computer but I just can't see because the apple logo with the black background won't go away.

Sometimes the progress bar gets stuck midway, sometimes at the beginning, and sometimes at the end, It is totally random. In rare cases does the apple logo and the background go away smoothly as It should and only then can I use the hackintosh.

Any opinions on solutions?
Thanks

CPU: Xeon E5-1650 V2
GPU: Quadro K4000
Motherboard: Intel C602 Chipset
Bootloader: Clover

 

[trs96]

Try a verbose boot to determine the cause. -v

 

[jackassninja]

Should I input that as a boot flag, because If I should, It already Is. When I boot I get the long line of texts (similar to linux) scrolling by but when It gets to the user login, It has to show the apple logo with the progress bar first.

Is this what you mean?