Jedi Academy Multiplayer (and a few other Q3 engine games) doesn't run on Lion/Mountain Lion because of some OpenGL issues on ATI graphics cards. JKJALaunch is a launcher for Jedi Academy Multiplayer that forces ATI FSAA off, allowing the game to run on Lion. It also allows you to specify command-line options and force 32-bit colour (as needed on certain graphics cards). By default OpenAL is turned off by the launcher. If it is turned on then the sound system of the game is automatically restarted on launch by the launcher to avoid a slowdown on Lion. Hold Shift down at launch to bring up the options window, where you can choose the location of Jedi Academy Multiplayer and set the command-line options (such as launching mods with +set fs_game modname). Otherwise, the launcher will just launch the application from the saved path with the saved options (if there are any). When you're asked to find Jedi Academy MP, you can also select Jedi Academy, Jedi Knight II, Jedi Knight II MP or Wolfenstein ET. (if Jedi Academy MP can be found in the same folder as JKJALaunch, and your preferences are not to launch another application in the folder, this copy will be launched regardless of the previously saved path) You can download it from here. There's a slightly out-of-date screenshot of the options window here.