Mac Forum / Applications / Mac Applications / February 2005

Disclaimer: complete newbie who needs help, haven't read the FAQ, did
RTFM and googled and found no answer. Please set followup-to to either
.system or .apps if you feel it's appropriate.

http://developer.apple.com/darwin/runningx11.html says that one can a
24-bit and an 8-bit (pseudocolor) X11 server on Mac OS X 10.3.7 in
parallel (i.e. Mac's own X11 server) by issuing

$ Xquartz -depth 8 -displayID 1

However, when I do that, I get an error message

Fatal server error:
Server is already active for display 0
       If this server is no longer running, remove /tmp/.X0-lock
       and start again.

  OsVendorFatalError
  AbortDDX
Quitting XDarwin...

I don't understand why it complains about display 0 when I ask it to
run as diplay 1. Has anyone managed to get Mac's X11 running two
servers in parallel, with different display IDs?

Thanks.