X.Org X Server 1.13.0
Release Date: 2012-09-05
X Protocol Version 11, Revision 0
Build Operating System:  2.6.32-279.9.1.el6.x86_64 
Build Date: 30 November 2012  07:30:11PM
Build ID: xorg-x11-server 1.13.0-11.fc18

REFERENCE Fedora post <http://forums.fedoraforum.org/showthread.php?t=288544>

If I perform a fresh install of Fedora 18 on my Macbook Pro 3,1 and perform no
updates, my unit runs and reboots fine. Once I perform updates and install the
latest Xorg updates my unit will only boot to a black screen after rebooting. I
determined it was Xorg after installing the Kernel and Xorg updates seperatly.
I have tried numerous times, and the cause is the Xorg current update (see the
above attached link). My video card is the Nvidia 8600M GT 128MB, but the
driver is nouveau. I tried installed the proprietary Nvidia drivers after
performing the Xorg update and it still displays no video.