It isn't, a cocoa / quartz friendly port is already partly done and runs well as long as you don't need all the esoteric functions that VICE offers. Binaries av

It isn't, a cocoa / quartz friendly port is already partly done and runs well as long as you don't need all the esoteric functions that VICE offers. Binaries available on the VICE page. For the really concerned, Xquartz is the basis for X11.app which is openly available from MacOSForge so X11 as a whole isn't going to disappear anytime soon it may just require a bit more effort to get running.