Get it here.
I know I said that I wanted beta 5 to be the last beta, but consider this a GM candidate build. I'm going to resist making an major and most minor changes for this release after this point. Please, please let me know of any problems that you have as I want to get this out within a short amount of time (ahead or at least at the same time as Mountain Lion). This beta has several crash and regression fixes from the previous beta. This also adds Gatekeeper support as well as Retina-ready graphics for anything that was missing it (mostly the preference panes). Despite the new images, download size should actually be down due to other file optimizations. Again, please let me know of any issues via the Report a Bug item in the Help menu.