I still can't get the native version to launch on my Mac Pro running 10.5.5. The latest X11 version (2.4.7) works fine, but when I try to launch the native version, I get the icon in the Dock and the application name appears in the menu bar, but nothing else happens. I know the bit about waiting for a while—I always have to do this when installing a new version of the app that uses X11—but with the native versions, no matter how long I wait, niente. This has been the case with all of the experimental native versions. It's a puzzle . . .