to run OpenVMS X11 apps on my 17" MacBookPro OS X 10.5.8 after launching X server on the Mac and setting security preferences to allow network clients. $ SET DISPLAY/CREATE/NODE=192.168.2.100/TRANSPORT=TCPIP $ MCR DECW$PUZZLE You *may* need to set your X server security preference to NOT authenticate the connection. Restart X11 on your Mac if you disable authentication. Doing an xhost + basically disables any authentication. But he is tunneling X over SSH, which in itself might cause interesting effects here. Not sure why he wants to do that, but anyway. Sampsa, try what Brian suggested, in actually talking X directly over TCP/IP instead, and see if that don't work better perhaps? Also, could you report what your display is actually set to when you ssh in? Johnny