Mac users! I finally got the mod to work! Follow these steps to get it working. Download the game on Steam. Download the Modification Star Wars: Movie Battles II v1.3.1 download Open Steam Folder. > Right click on game Jedi Knight: Jedi Academy > Properties > Local Files > Browse Local Files You will find the folder " Star Wars Jedi Knight: Jedi Academy " > Right click > Show package contents You will see folder " Contents " and " installscript_osx.vdf " > click and open Contents > Move ALL FILES from the newly downloaded Modification folder ( mb2-v1-3 ) into " Contents " ( Equivalent of Game Data in MAC ) Go to folder " MB II " Copy " z_MB_BaseAssets.pk3 " from MB II folder and paste into Base folder ( This will remove any bugs with models ) Remove the remaining " z_MB_BaseAssets.pk3 " in folder MB II Download the version 1.3.1 to 1.3.2 Upgrade http://www.moviebattles.org/download/servers/V1.3.1_V1.3.2_Upgrade.zip > Unzip the file and then take all the files from inside the MBII folder (the one you just downloaded) and move them to the MBII inside your "contents" folder inside of Jedi Academy. Download Jedi Academy MP Launcher http://jkhub.org/files/file/1019-jedi-academy-mp-launcher-for-os-x/ > Open folder > Move "JKJALaunch.app" into Jedi Academy folder ( Will appear beside " Star Wars Jedi Knight: Jedi Academy " ) > Double click " JKJALaunch.app " > Under command line options type in "+set fs_game MBII" (without quotes). If you've tried this many times and already have the JKJA downloader installed, hold shift while opening the JKJA launcher to bring up the settings in order to get to the comman line options. > Check the "Save these settings" box and continue > Launch Multiplayer! Let me know if you have questions.