[localhost:/usr/X11R6/bin] root# ./X -quartz
Running in parallel with Mac OS X Quartz window server.

XFree86 Version 4.1.0 / X Window System
(protocol Version 11, revision 0, vendor release 6510)
Release Date: 2 June 2001
If the server is older than 6-12 months, or if your hardware is
newer than the above date, look for a newer version before
reporting problems. (See http://www.XFree86.Org/FAQ)
Operating System: Darwin
Display mode: Quartz

Fatal server error:
assert failed on line 454 of darwinKeyboard.c!

OsVendorFatalError
AbortDDX
Quitting XDarwin...
[localhost:/usr/X11R6/bin] root#