I am tunneling X Window over ssh on my local OSX machine using XQuartz. Now the GUI of course looks different than what I would get when I start programs on ubuntu locally. Is there a way to make my XQuartz on OS X draw the same GUI that Ubuntu offers?
This may not be what you are looking for, but you could just draw the programs on the Ubuntu server and display them on the mac using xpra. There are other advantages to this approach: lower bandwidth consumption, no crash if the network drops (just re-connect).