Hi javier,

re:
> I've installed the last version of XQuartz and is not working for me.

There are 2 steps you need to do - one is to install the latest XQuartz.

Then the second thing you have to do is alter a setting in MoI to make it use the system installed XQuartz rather than the bundled one.

If you only have installed XQuartz and did not alter the setting you won't be able to run until you also do that second step.

Please follow the instructions from here:
http://moi3d.com/forum/index.php?webtag=MOI&msg=6967.4

- Michael