Mountain Lion does not come with X11 preinstalled. However, as Nat states, you can very easily install Xquartz Thus far, all of the crystallography programs that were working under Snow Leopard and Lion are still working on my laptop with Mountain Lion.
-Tony --- Dr Antony W Oliver Senior Research Fellow CR-UK DNA Repair Enzymes Group Genome Damage and Stability Centre Science Park Road University of Sussex Falmer, Brighton, BN1 9RQ email: antony.oli...@sussex.ac.uk tel (office): +44 (0)1273 678349 tel (lab): +44 (0)1273 677512 On 8/9/12 4:25 PM, "Nat Echols" <nathaniel.ech...@gmail.com> wrote: >On Thu, Aug 9, 2012 at 8:14 AM, Quentin Delettre <q...@hotmail.fr> wrote: >> I have seen that in the last Mac Os, X11 have been removed... But can >>still >> be used with some package installation. > >I guess it isn't distributed with the OS any more - but it is still >available: > >http://xquartz.macosforge.org/landing/ > >-Nat